Ferdinand appeared to trip the Spaniard before pushing him in the back in the 86th minute of the clash at Old Trafford.
The FA will look again at the footage before deciding what action, if any, to take but Chelsea manager Rafa Benitez refused to be drawn on the incident.
"I haven't seen the replay - you can see the replay," he said when asked for his response. "You have an advantage and can do it now."
Benitez also confirmed he had spoken to Torres about the matter but would not go into any details.
"I don't talk about things that happen on the pitch," he added.
Benitez himself was involved in a spat with his opposite number Sir Alex Ferguson, who appeared to snub the Chelsea boss's handshake before the game, while the pair also failed to shake hands at the final whistle
As for the game itself, Ferdinand was frustrated United let their opponents back into the game after holding a 2-0 advantage.
Two goals in the opening 11 minutes from Javier Hernandez and Wayne Rooney put the home side in control but a stunning Eden Hazard strike in the second half was followed up by a well-taken Ramires goal as Chelsea earned a replay a Stamford Bridge.
"We gave them the impetus to claw their way back into the game. We played some great football at times but were so careless at times," said Ferdinand.
"If you are careless you are going to get punished. That was the case.
"But we are still in the cup. Wembley is waiting for one of us to go through and hopefully it is us.
"We go to Stamford Bridge for the replay with confidence. We have the tools. We have been there before this season and done well and with the squad we have we don't fear going anywhere."