This is a, added to Adobe Reader. You can turn it off in the bValidateBytesBeforeHeader registry keys as shown in the link above.

But, be careful - it is possible that the reason your PDF documents are failing the additional security check is because they've been tampered with or infected. This is, so be sure to virus scan those PDFs before you go opening them. Edit: The registry keys given are: HKCU Software Adobe (product name) (version) AVGeneral bValidateBytesBeforeHeader - which is a DWORD value, and should be set to 0 to skip the check. The product name and product version will look something like: HKCU Software Adobe Acrobat Reader 11.0 AVGeneral The above key is in the HKEY_CURRENT_USER hive, and will only affect the current user. Array af 10mr a manual download. Another key is located in the same path under HKEY_LOCAL_MACHINE (HKLM). Also, note that if you have installed a 32-bit version of Adobe Reader on 64-bit Windows, you will have to add Wow6432Node in between Software and Adobe, eg: HKCU Software Wow6432node Adobe Acrobat Reader.

Adobe Reader could not open a PDF file because it is either not a supported file type or because the file has been damaged (for example, it was sent as an email attachment and wasn't correctly decodes).

We just noticed that hundreds of pdf files on our network on a certain directory we can not access. These files were scanned unto the network from an Epson scanner as pdf files. All other pdfs on the network that were not scanned we are able to open them. The ones that been scanned we get the following error message: Acrobat could not open 'filename.pdf' because it is either not a supported file type or because the file has been damaged (for example, it was sent as an email attachment and wasn't correctly decoded). To create an Adobe PDF document, go to the source application. Then print the document to Adobe PDF.

-----------END OF ERROR MESSAGE We are running Adobe Acrobat Pro 9 in a Windows 7 environment. Please advise how we can fix these files so we can open them. I found something in the root of the folder called: Decrypt_instruction.txt file: it states something about CryptoWall 2.0: What happened to your files? All of your files were protected by a strong encryption with RSA-2048 using CryptoWall 2.0. More information about the encryption keys using RSA-2048 can be found here: What does this mean?

This means that the structure and data within your files have been irrevocably changed, you will not be able to work with them, read them or see them, it is the same thing as losing them forever, but with our help, you can restore them. How did this happen? Especially for you, on our server was generated the secret key pair RSA-2048 - public and private. All your files were encrypted with the public key, which has been transferred to your computer via the Internet. Decrypting of your files is only possible with the help of the private key and decrypt program, which is on our secret server.

What do I do? Alas, if you do not take the necessary measures for the specified time then the conditions for obtaining the private key will be changed.

If you really value your data, then we suggest you do not waste valuable time searching for other solutions because they do not exist. For more specific instructions, please visit your personal home page, there are a few different addresses pointing to your page below: 1. If for some reasons the addresses are not available, follow these steps: 1.Download and install tor-browser: 2.After a successful installation, run the browser and wait for initialization. 3.Type in the address bar: paytordmbdekmizq.onion/pYL NU5 4.Follow the instructions on the site. IMPORTANT INFORMATION: Your personal page: Your personal page (using TOR): paytordmbdekmizq.onion/pYL NU5 Your personal identification number (if you open the site (or TOR 's) directly): pYLNU5.