This indicates an attack attempt against a vulnerability in Adobe Reader, Acrobat and Flash Player.
The vulnerability is caused by an error when the vulnerable software handles a specially crafted SWF file or PDF file that could allow remote attackers to execute arbitrary code.
Reader and Acrobat 9.1.2
Flash Player 9 and 10
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are not aware of any patches supplied by the vendor for this issue.