Is pdf virus proof?

Posted by Jonathan on Super User See other posts from Super User or by Jonathan
Published on 2010-05-17T19:41:16Z Indexed on 2010/05/17 19:51 UTC
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I am creating a secure document portal for a client. One of the things that they are worried about is having someone upload a document with a virus. One solution that might work is to enforce that they only upload pdf files.

My question is two fold:

Most importantly, is a pdf document virus proof?
How can you determine in a *nix environment that a file is a pdf, besides just looking at the extension.

Thanks!

Jonathan

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