A 16-year-old girl has been pulled into bushes and assaulted in a brazen attack on Brisbane's northside.

Key points: The teenager managed to fight off the attacker, kicking him before running away

The teenager managed to fight off the attacker, kicking him before running away He was described as a Caucasian man in his 20s-30s, roughly 185cm tall

He was described as a Caucasian man in his 20s-30s, roughly 185cm tall Police want to speak to anyone who noticed a man acting suspiciously in the area

Police said the girl was walking along a footpath on Kittabilla Street, near the intersection with Craigslea Street at Chermside West, just after midday on Wednesday, when a man approached her.

He put his hand over her mouth and dragged her into nearby bushes.

But the teenager fought back, struggling free and kicking the attacker before running away.

Police said the girl was not physically injured in the attack but was "naturally very distraught".

Police said this man might be able to help them with their investigation. ( Supplied: Queensland Police Service )

The man was last seen running along Buran Street in Chermside West.

He is described as Caucasian, aged in his late 20s to early 30s, approximately 185 centimetres tall, with a proportionate build and stubble on his face.

The man was wearing a white t-shirt, black shorts, a black baseball cap, and black-framed sunglasses with orange reflector lenses.

Police are appealing for anyone who noticed a man acting suspiciously or who seemed out of place in the suburb to come forward with information.

Shortly after 9:00pm on Wednesday, police released a computer-generated image of a person they believed could assist with their investigation.

Police are also asking for any motorists who may have driving in the area near the assault between 11:30am and 12:45pm on Wednesday, or any homeowners who live nearby and may have CCTV footage, to contact them.