Seven months' worth of mistakes: A longitudinal study of typosquatting abuse

Typosquatting is the act of purposefully registering a domain name that is a mistype of a popular domain name. It is a concept that has been known and studied for over 15 years, yet still thoroughly practiced up until this day. While previous typosquatting studies have always taken a snapshot of the typosquatting landscape or base their longitudinal results only on domain registration data, we present the first content-based, longitudinal study of typosquatting. We collected data about the typosquatting domains of the 500 most popular sites of the Internet every day, for a period of seven months, and we use this data to establish whether previously discovered typosquatting trends still hold today, and to provide new results and insights in the typosquatting landscape. In particular we reveal that, even though 95% of the popular domains we investigated are actively targeted by typosquatters, only few trademark owners protect themselves against this practice by proactively registering their own typosquatting domains. We take advantage of the longitudinal aspect of our study to show, among other results, that typosquatting domains change hands from typosquatters to legitimate owners and vice versa, and that typosquatters vary their monetization strategy by hosting different types of pages over time. Our study also reveals that a large fraction of typosquatting domains can be traced back to a small group of typosquatting page hosters and that certain top-level domains are much more prone to typosquatting than others.status: publishe