ive looked at other tabs on the site and listened to the song myself 
and this is what i think is right
 h = hammer on


main riff
G-------------------
D-------------------
A-------------------
E-2-2-2-0h5-0h6-0h7-

then
G-------------------
D-------------------
A-0-0-0-0h3-0h5-0h6-
E-------------------