This indicates an attack attempt against a Memory Corruption vulnerability, which was discovered by Fortinet's FortiGuard Labs, in Adobe Shockwave Player.
This vulnerability is caused due to insufficient validation on the index value inside 'demx' atom. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application.
Adobe Shockwave Player 18.104.22.168 and earlier
System Compromise: Remote attackers could gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.