Improper parsing of the PDF structure by various Symantec products leads to evasion of detection of malicious PDF documents at scantime and runtime.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/82290/GSEC-47-2009.txt
Source: https://packetstormsecurity.com/files/82290/Symantec-Generic-PDF-Bypass.html