it has nothing to do with "invisible" connections.
a software in the same PC where you run HFS connected to HFS and made that request.
i doubt it found what it was looking for

it looks like a search for an update, and it's far from being a problem.
i have a software that i don't want it to connect to its server, so i put a line in my hosts file and it tries to connect to 127.0.0.1 (finding nothing). this brings me similar log lines in HFS.