He grabbed the teenager from behind and started dragging her through the ginnel to a nearby car park, but thankfully, the teenager managed to fight him off and run to safety.
Police were informed of the incident a short time later and an investigation is underway.
The offender is described as a skinny white man in his 30s and around 5ft 4inches tall. He was wearing blue jeans with holes in the knees and old red Adidas trainers.
Detective Sergeant Dave Jones of GMP’s Trafford borough said:
“Thankfully the teenage girl managed to escape and run to safety, but she has been left incredibly shaken by this traumatic experience.
“Parents will understandably be concerned, which is why we’ve increased patrols in the area, so if you have any concerns or questions, please have a chat with these local officers who are there for you.
“It’s a busy time of day and this incident took place near to local shops, so if you were travelling around the area and saw anything that could help us identify who this man is, please get in touch.”
Anyone with information is asked to contact police on 0161 856 7747, quoting incident number 1745 of 08/02/18. Reports can also be made anonymously through the independent charity Crimestoppers, anonymously, on 0800 555 111.