Well failed to follow up last weekend's 2-1 win at Hearts but remain second in the SPL table and have all but sealed a place in the top six.
McCall said: "I thought the first half was a really poor game. There wasn't much goalmouth incident until Darren Randolph's really good save just before half time.
"We don't get many clean sheets so we're delighted with that one today. We've taken four points from two tough away games, which we're pleased with."
McCall felt his side could have had a late penalty when substitute Zaine Francis-Angol went down under the challenge of Joe Shaughnessy.
He added: "On another day we might have had a penalty kick, but it would have been rough justice on Aberdeen if we had got it and scored it. The most we deserved today was a point.
"Shaughnessy tried to get a foot on the ball and I don't think he got a touch, but he brought our player down.
"It was a gritty performance. We didn't really enjoy the game, but we enjoyed the point. We're more than pleased with the point because Aberdeen came on strong in the second half.
"The point almost cements us in the top six which was the main aim at the start of the season."