It happened around 9:45 a.m. on June 6th on the 700 block of Adams Avenue.
Police say a woman was standing at an ATM when she was approached by an unknown male from behind.
As the woman's money was dispensed from the machine, the suspect grabbed the cash and fled.
The suspect is described as a black male, approximately in his 20s, about 5'6" tall and last seen wearing a gray hooded sweatshirt and jeans.
Anyone with information is asked to contact Philadelphia Police at 215-686-TIPS (8477), text a tip to PPD TIP (773847) or through PhillyPolice.com.