It is both - a Ricikan configuration on the base of blade is Sumatran in style, but the execution of it is pointing to Malay peninsula.
We had discussions of similar blades before:
http://www.vikingsword.com/vb/showth...gunungan+keris
Regarding the scabbard, I once had a Keris from Borneo with s similar one, but that msy have been just a coincidence. It does look like a scabbard a man, who wasn't a Tukang Wrongko just made for a Keris himself, and could come from everywhere in Malay world.