The suspect is described as at least six-foot-two, older than 40, stocky, with short white or grey hair in a receding pattern.
But what makes him unique is the way he walks, according to police.
"Walks with a hunched posture and bit of a 'penguin-like' gate," said an RCMP statement released on Wednesday.
It also describes the man's clothes as black baggy pants and a T-shirt.
The young woman was walking home just before 11:30 p.m. on Monday near No.3 Road and Bennett Road in Richmond, when she was grabbed from behind.
She fought her attacker and was thrown down. Her screams attracted to people who helped her. Police dogs were called out to help search for the man.
"We believe this to be an isolated incident, we take this opportunity to remind all pedestrians to be aware of their surroundings when walking alone late at night and consider walking with a friend when possible," said RCMP Corporal Dennis Hwang.
Contact Richmond RCMP or Crime Stoppers with any information.