I happened to come across mention of the SS SAMUEL GRIFFIN (not SAMUEL GRIFFITH), which won a battle star for its participation in the invasion of southern France, 15 Aug 1944-25 Sept 1944. See http://usmm.org/battle-n-z.html and scroll down. That does not match your date of November/December 1942, nor the location of interest to you, namely Oran, Algeria.
From the name of the ship you provided, SAMUEL GRIFFITH, she may very well have been a Liberty ship. But checking an on-line compilation of all Liberty ships by name, I find the SAMUEL GRIFFIN that I mention above but not a SAMUEL GRIFFITH.
Additionally some ships were awarded battle stars for the "Algeria-Morocco landings" in November 1942 but SAMUEL GRIFFIN is not among them; see http://usmm.org/battleurope.html. The only battle star she won was for the invasion of southern France nearly two years later, as noted above.
Ron Carlson, Webmaster