The former Fiorentina midfielder represented his country 31 times.
And Perth coach David Mitchell expects Amaral to fit in after his impressive displays during an off-season tour of Indonesia.
"Amaral is a wonderful footballer, he's the type of player we've been missing in the last couple of seasons," Mitchell said.
"His interplay with the rest of the team after just a short time is outstanding and all the lads have taken to him straight away and can see that he is a special player. He will be a terrific addition to the squad and Glory fans will definitely enjoy watching him play.
"He has a real presence about him while also bringing a calming influence when on the ball. There are very few players in the A-League who play the same position that have his awareness and ability."
The 35 year old must await visa approval before officially joining up with the Perth squad.
"I am very happy to be part of the group and feel like I am part of a big family," Amaral said.
"The manager and players were very friendly and welcoming and I already feel like I have been playing for Perth Glory for a long time.
"I think the manager and players are very strong and that we have a big chance of making this an excellent A-League season for the Glory."