Methods, systems and media for detecting non-intended traffic using co-visitation information

A non-transitory processor-readable medium storing code representing instructions to be executed by a processor, the code to cause the processor to:

• receive data associated with access by a plurality of entities to a first plurality of website locations;
• define a co-visitation factor for each website location from the first plurality of website locations based, at least in part, on the data;
• select a second plurality of website locations from the first plurality of website locations, the co-visitation factor for each website location from the second plurality of website locations being over a predefined threshold;
• select a third plurality of website locations from the second plurality of website locations, each website location from the third plurality of website locations being associated with a common publisher;
• and
• send a signal indicating the common publisher is a suspicious publisher.

A non-transitory processor-readable medium storing code representing instructions to be executed by a processor, the code to cause the processor to:

• receive data associated with access by a plurality of entities to a plurality of website locations;
• calculate, for each website location from the plurality of website locations, a number of entities in the plurality of entities that accessed that website location and at least one other website locations from the plurality of website locations based, at least in part, on the data;
• and
• send, for each website location from the plurality of website locations for which the number of entities for that website location indicates a likelihood of unintended access to that website location, a signal indicating that website location is a suspicious website location.