Lara O’Reilly:

An ad-tech firm says it has discovered a large and sophisticated advertising-fraud operation in which fake websites and infected computers were used to scam advertisers and publishers out of upward of hundreds of thousands of dollars a day.

Denmark-based Adform, identifier of the scheme, named it “Hyphbot” and estimates that it has been going on since at least August.

According to Adform, the fraudsters behind the Hyphbot scheme created more than 34,000 different domain names and more than a million different URLs, many designed to attempt to fool advertisers into thinking they were buying ad inventory from big-name publishers such as the Economist, the Financial Times, The Wall Street Journal and CNN. It is a tactic known in the industry as “domain spoofing.”