Brady struck a wonder goal to prove the Tigers' matchwinner.
Dublin-born Brady is on a six-month loan from United.
Hull skipper Andy Dawson said: "The lad is top class in terms of attitude and ability.
"There were times when things didn't go his way but that made him work harder and he got his reward.
"Did he mean it? Well, the first thing you do as a wideman when you cut in is aim for that far post. If he got a bit lucky, nobody can say he didn't deserve it."