I wouldn't think so. She appears to have white legs, and her comb and wattles are quite red. Sumatras have a lot of dark pigmentation on their faces. They kindof look more purple than red. Her body cariage is also quite upright for a sumatra, though the camera angle could be making it hard to see. PO, can you get a more level upclose picture of her? She also appears to have a top knot which would also make me think she is not a sumatra.
With an upclose picture, I may change my mind...from this distance, it is really hard to tell.