This paper model is a Klingon Cruiser D4 Class warship, a type of small Klingon patrol ship used by the Klingon Empire in the alternate reality in the mid 23rd century, based on the Star Trek franchise, the paper model was created by Pericles Lopes Gomide Filho.
In 2001, a new Klingon ship was called for, intended to serve as Vorok's battle cruiser in "Unexpected", season one's fifth episode of the new series, Star Trek: Enterprise. The Enterprise team, understandably exhausted after all the work they had put into the Enterprise pilot episode, were asked to do yet another design at the last minute. However, despite the work put into the design and the built of a new CGI model, it ended up not being used. The result was that a K't'inga-class CGI model was employed for Vorok's battle cruiser, that was originally constructed for Star Trek: Deep Space Nine, causing a continuity error, and which had also appeared in another subsequent continuity error in the Star Trek: Voyager episode "Prophecy", as a D7-class battle cruiser. [Source: wikia]
You can download the papercraft model here: Star Trek - Klingon Cruiser D4 Class Warship Free Paper Model Download