http://blog.threatfire.com/2009/03/pdf-reader-exploitation-2009.html
PDF Reader Exploitation 2009
http://blogs.zdnet.com/security/?p=5903
FIFA World Cup themed malware campaign spreads malicious PDF files
http://www.theregister.co.uk/2010/03/29/software_update_trojan/
Trojan poses as Adobe update utility
Foxit Reader update now Fix look out for tool bars
http://www.techsupportalert.com/best-free-non-adobe-pdf-reader.htm
http://en.wikipedia.org/wiki/PDF