Holy smokes, there was an entire thread about this that I just found! Kudos to @Wickedobject
https://forums.etarc.org/t/communications-from-the-future-to-us-in-the-past/230
And here are the images that I originally referred to. Kudos to @Orioncrush
https://forums.etarc.org/t/pdf-investigation/87/8