Secret Search.dmg ruining a relationship

So recently a family friend who is not tech savvy in the least was confronted by his wife because she found a file called "Silent Search.dmg" on his computer (MAC). She claims it's for hiding his porn searches and he claims to have no idea what it is. I did some research into it but couldn't find much about it except for duckduckgo but I'm not sure why that could be a .dmg. If anyone knows what this is please help me out, it's causing a lot of strife with them and I'd love to help clear it up.

Submitted May 31, 2017 at 11:44AM by TrueFate http://ift.tt/2rmYsp3