Hm. It is legal according to them.
They are a foreign group. According to them, they don't have to abide by American law, only the laws of Sweden.
From their TOS
Digital Millenium Copyright Act (DMCA)
The DMCA is a law passed in the United States of America and as such is not recognised by the state of Sweden and therefore by ourselves. As citizens of the country Sweden we abide by all laws of our country and only our country. All DMCA notices will be ignored as they are not applicable. If you believe are an entity, corporation or individual who believes a hyperlink on our site infringes their copyright we advise you to contact the actual website that is hosting the material. If you cannot determine which website is actually hosting the material then please send a request and we will attempt to help you as a gesture of good faith.