Cognitive and cultural embeddedness: combining institutional economics and economic sociology
According to this, pederasty is sexual relations between two males, especially when one of them is a minor. Other definitions, like the one that JSBangs found, differ slightly. But otherwise, I think you answered the question yourself: pedophile refers to the attraction, while pederasty refers to the act itself.
1 Z-plasty is a method to move a scar from one area to another, usually into a natural fold or crease in the skin to minimize its visibility. 2  While Z-plasty does not remove all signs of a scar, it does make it less noticeable.