A sexual prowler is believed to have pounced again at Denaby Crags and attacked another innocent woman.
Police are investigating a total of eight reports of sexually-motivated attacks in the same area since February.
The latest incident happened when a 26-year-old woman was walking along a footpath on the Crags on Thursday, November 20, at around 2.20pm.
A police spokeswoman said: “She was grabbed from behind by an unknown man who attempted to pull her towards some nearby bushes.
“The woman was able to break free and fled the scene uninjured however she is incredibly distressed and shaken by the incident.”
Officers believe this latest attack could be linked to others earlier this year.
They have now released an e-fit picture of the suspect.
The man is described as white, aged around 30-years-old and of a medium build.
He had a dishevelled appearance with brown stubble on his face, going high up on his cheeks, and he had dark circles underneath his eyes.
He also had a noticeable, sore looking spot to the right side of his nose which was clearly visible beneath the stubble and he smelled of alcohol.
He was wearing a burgundy hooded top and loose fitting black trousers.
It is suspected that he may have been hiding in the undergrowth prior to the attack.
Detective sergeant Andy Knowles said: “We would like to speak to anyone who may have information relating to this incident and to anybody who was on the Crags between 1.30pm and 2.30pm on that day.
“In particular, we would like to speak to a man who was seen walking a tan coloured, staffy type dog that afternoon, as he may hold vital information to assist with the investigation.
“He is described as aged around 60-years-old, approximately 5ft 5ins tall and with grey hair. He was wearing a grey knitted jumper and brown trousers. If you believe this may be you, or you know the identity of the man, please contact officers on 101.”
Anyone with information can contact the police on 101, or Crimestoppers anonymously on 0800 555111, quoting incident 574 of 20 November 2014.