Clicking on the file name on this AT page shows a checksum of b8db74e4, as Kirinkato reported, not the value reported in the file name.  This tells us that the file arrived at AT this way, and has nothing to do with the various download services it gets spooled to.  My best guess would be that the authors of the file just included the wrong crc value in the file name, perhaps by revising the file but forgetting to update the reported crc.  What I can tell you is that so far there have been 1000 downloads of this torrent and no complaints about anything at Nyaa, but no one at Nyaa has noticed or reported this checksum difference.  My view is that a crc-checksum is only a test for errors in transmission.  If the file plays fine, I wouldn't worry about it, myself.  An mkv file can be garbled in transmission or deliberately altered for a prank, but poses no security risks that I am aware of, unlike an exe file.  But there are several other versions of this movie listed here at AT, if you prefer.  Here's the page that lists them:

https://animetosho.org/series/fuse-tep...ochou.9074

Karoshi-Subs is a new name to me, and someone complained about how he encoded audio on another recent release.  If he is new to fan-subbing, he may have a few bugs to work out on how he does things.  Or perhaps this torrent had a problem in transmission here to AT.

I hope my answer is as clear as your note was.