According to the man's son, the four suspects then continued to hurl abuse before bashing him, breaking the 74-year-old nose, and leaving him with face and jaw injuries
The victim, who suffered a broken jaw, is out of hospital and recovering from his ordeal.
He said he was chuffed to hear that an arrest has been made.
Sergeant Will Hamilton of Huntly police said that the arrest "was a fantastic result and demonstrates the power of modern media".
"This young man has succumbed to the pressure and has made the right decision to face the consequences of his actions.
"Police will take every opportunity to target and catch offenders."