Spoopy plane 2-DEER (Deer Jet) at 35,000ft over the Azores headed SW.
It's one of those anonymized 'exec taxi' planes that you can't find anything out about. Linked to Guernsey via 2-reg. People with money who don't want to be tracked would use something like this. Deer Jet is linked to Beijing Capital Airlines, so add China into the mix.
Now is it weird?
2-DEER's flight log. Considering that these planes aren't cheap to charter, it certainly gets about a lot. Deer Jet's Dreamliner costs $74k per hour to rent.
Navy Gulfstream up out of Washington