Florent Balmont was next to go close for the home side after good work from Hazard, but his effort drifted just wide.
Hazard handed Lille the lead with a fine free kick after 34 minutes, but the home side were reduced to ten men before the break when Mauro Cetto was shown a red card.
Lille extended their lead to 2-0 after 63 minutes when Hazard converted a penalty after Boly had brought down the Belgian in the area.
It got worse for the away side moments later when Anthony Le Tallec was dismissed from play after a foul on Pedretti.
Auxerre found a late flurry, however, bringing the score to 2-1 with a strike from Ben Sahar after 80 minutes.
The away side found an equaliser late on courtesy of Cedric Hengbart who headed home a Sahar corner much to the frustration of the home crowd.
Lille remain in third, while Auxerre sit 19th.