Go to https://archive.ph/jXv3A#selection-5079.208-5079.212 Click on "Filed on Tuesday" and it will redirect you to a site telling you to download something.
(To be fair, that isn't the only redirect so you might need to click it a few times.)
Thanks, that's pretty much all I was looking for. Was able to reproduce but then started getting 429s.
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It immediately stands out that that link is to a /wp-content URL. AKA wordpress. AKA PHP. AKA very recently vulnerable (and perhaps still)...
Whereas other links (e.g. the immediate next one to arxiv) seem unaffected.
edit: That was a red herring. It seems to redirect all .pdf links I try that don't point to a valid snapshot. Very interesting.