September 25, 2008 - "US-CERT is aware of public reports* of improved attack toolkits for exploiting vulnerabilities in PDF reader software..."
September 22, 2008 - "...Secure Computing... spotted a new and yet unknown exploit toolkit which exclusively targets Adobe’s PDF format. This toolkit is dubbed the “PDF Xploit Pack
”... This new toolkit targets only PDFs, no other exploits are used to leverage vulnerabilities. Typical functions like caching the already infected users are deployed by this toolkit on the sever-side. Whenever a malicious PDF exploit is successfully delivered, the victim’s IP address is remembered for a certain period of time. During this “ban time” the exploit is not delivered to that IP again, which is another burden for incident handling. Other existing toolkits have also been enhanced with PDF exploits lately..."
"...users should make sure to upgrade to Adobe Reader 8.1.2*** as soon as possible..."