You could always move 'em out, to a "neutral" location and see what happens.
I am finding a bunch of files, many of which have zero K, which seem to be records of downloads or connections in my pref folder:
cfx#iq2hiqK 0 KB
cfx#ItOk1Kq 4 KB
cfx#ivPLkkS 0 KB
cfx#JR3YtOZ 0 KB
If I open one that has 4 k, e.g., it says
_$FolderLocConnectToExpandedLSBindings_BlendNewNetworkApple^IBeamFormatXMy_NSWindow Frame Progress Panel_#NSWindow Frame Progress Panel Frame