Security Basics: FAX a virus

[Alcides <alcides.hercules () gmail com>]

Hi lists,
My FAX server allows me to receive faxes from my clients from Internet.
My clients send me some documents using their built-in Fax Printer on 
their PC. My fax server routes the stuff to the document processing 
applications. The document processing system extracts various data 
fields from received portable document format files.
The whole scenario is windows environment and let's assume that virus 
protection is temporarily off.
Now, I have a query:
Can anyone send a fax that includes a file infected with the virus/ worm 
operates as a VBS script embedded within a PDF/TIF file to cause 
infections to my computers/ to affect my FAX system?
What about other possibilities of "the bad guys" using some joiner (or 
wrapper as some say) to bind malware (trojan server etc) with the pdf/ 
TIF files and fax it to me?
I would be very greatful to know what are the various possibilities.

Warm regards,
Alcides.

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