Yep, it's shock damage, common in circumstances where the package has been dropped. The correct way to pack a guitar for shipment is with the strings slackened off at least a couple of turns, and with the headstock immobilised by packing under, above and around it using something like bubble-wrap or scrunched-up newspaper.

Talk to the sender. It's gut-wrenching to receive a guitar in such circumstances but, if they are an honest and reputable company, they will almost certainly make it right.