The Iranian international striker has joined the top Greek team with a contract is reportedly worth 400,000 euros.
Ansarifard had already caught the eye of Dutch professional football club Feyenoord Rotterdam, Olympique de Marseille, PAOK and AEK.
The international striker joined Greek Superleague club Panionios from Osasuna in 2015.
The 26-year-old player started his playing career at Saipa in 2007 and joined Iranian popular team Persepolis after five years.
Ansarifard has made 54 appearances for Iran national football team and scored 14 times.