From 2-spyware.com
ChinAd, otherwise known as Adware.ChinAd, is a heuristic[1] detection name used by various security programs to describe a computer threat. In this case, as the name suggests, the infection is related to adware, while “Chin” represents that it is targeted towards the Chinese market. Heuristic analysis is very common in cybersecurity and is typically used to detect unknown threats, as well as new variants of those.