This indicates an attack attempt against a heap-corruption vulnerability in Adobe products.
This issue is caused by an error when the vulnerable software handles the "printSeps()" function within a PDF document. It may allow remote attackers to execute arbitrary code by sending a crafted PDF file.
Adobe Reader version 9.4 and prior
Adobe Reader version 8.2.5 and prior
Adobe Acrobat version 9.4 and prior
Adobe Acrobat version 8.2.5 and prior
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the patch supplied by the vendor: