This indicates an attack attempt to exploit a DoS vulnerability
in Apple Quicktime player.
The vulnerability is caused by an error when the vulnerable software handles a malicious src link. It allows a remote attacker to crash the application by sending a crafted web page.
Apple Quicktime player 7.6.2 and prior
Apple Safari 4 for Windows
Denial of Service: Remote attackers can crash vulnerable systems.
Currently we are not aware of any official patch for this issue.