According to AddThis documentation:
Click tracking codes are added after the share event and include an 11 character identifier and a service code separated by a period. Here are some examples:
#.F7dajfk324d.facebook
#.USvUZ935AHc.google
#.USvU9jbqfw9.twitter
Those weird hasTags are added to URL by AddThis extensions on the product details page.
Check this link to disable that feature.
www.addthis.com/academy/removing-hashtags-anchors-and-tracking-codes-from-your-urls/