I'm searching for a specific remix of "Chainsmokers - Closer"
 

So I managed to extract this from a remix tape (sorry for not providing a youtube link, uploaded it on soundcloud):

soundcloud-com/user-112672400-706950323/chainsmokers-closer-remix-help

I've been searching all day for this remix. But unfortunately I don't seem to be able to get a hold of it. I figured it could also be a mash-up of more than just one song. Any help would be much appreciated.

Greetings and thanks in advance.# :)