That semi tractor on the trailer weights 15,000 - 16,000 lbs. Trailer probably weighs 3,000 lbs. So say up to 20,000 lbs. being towed.
Looks like most of the weight is on the hitch, like 10,000 lbs at least.
Way outside what could be considered safe being hauled by a single rear wheel pickup.
Just wow....
Edit - If the engine and transmission is out of that semi, it could take 6,000 lbs off the weights above, but still looks to be overloaded - big time.