The 26-year-old forward has penned a two-year deal with the Iranian club for an undisclosed fee.
Abbas started his playing career in Baghdad-based club Al-Siyaha in 2011 and has also played in Iraqi teams Naft Al-Wasat, Naft Al-Junoob, Al-Quwa Al-Jawiya and Al-Zawraa.
Alaa Abbas has played 22 times for Iraq national football team and scored four goals.