Police are seeking to identify anyone who may have seen a group of seven or eight teenagers, predominantly dressed in red.
Police are also seeking to identify anyone who may have seen the woman that same night.
She was wearing a black puffer jacket, black leggings and a grey and white top.
"We are appealing for the public's help in identifying anyone that may be able to assist us.
The young female was extremely vulnerable and was targeted by a group of teenagers and was very lucky to escape without serious injury," said Detective Constable John Goddard.
He said the young girl was checked out medically and is now recovering at home.
Anyone who has information regarding the attack or the identity of the offender(s) is urged to contact Detective Constable John Goddard on (07) 855 0151.
Information can also be provided anonymously to Crimestoppers on 0800 555111.