The winger celebrated his Scotland call-up by pouncing on a slack pass by Ryan Porteous just before the break.
It gave the Pittodrie side a fourth straight win - and fifth in a row at home. Hibs are now without one in four.
Neil Lennon's side improved after the break, but Mark Milligan and Florian Kamberi missed chances to equalise.
Given that the previous three meetings had finished level after 90 minutes, two without a goal being scored, it was almost guaranteed to be a tight affair.