This indicates an attack attempt against a Memory Corruption vulnerability in Adobe InDesign CC.
The vulnerability is due to an error when the vulnerable software handles a maliciously crafted INX file. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted INX file.
InDesign 12.1.0 and earlier versions
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.