As he attacked her, the man tried to undress the woman. When she tried to defend herself, he continued to batter her, police said.
The woman was able to fight him off and was treated for facial injuries at a local hospital, according to police.
Police described the suspect as a man of unknown race with fair skin who stands 5'7" to 5'8" and has a slim build. He was wearing blue jeans, a dark coat and possibly a knit cap, police said. Just before the attack, he was seen walking eastbound on Dempster Street toward Maple Avenue.
There have been no similar incidents reported recently, according to police.
Anyone who believes they may have information about the incident is asked to contact the police department by calling 847-866-5000 or texting a message to CRIMES (274637) and typing "EPD Tip" with the anonymous tip information.