Because of this article https://help.ahrefs.com/en/articles/2172051-why-do-links-from-linkedin-slideshare-quora-and-pdf-files-not-appear-in-ahrefs-backlinks-report, I think you're right about Moz Crawler, I assume they are a little more selective about the quality of the links than Ahrefs which finds always more links than any other crawlerSo if you "know" (not sure how) that it won't show in Ahrefs, then it won't probably show in Moz (or it will).