is it negative seo

In the last two weeks my site has received 300 or so backlinks from I have requested the backlinks be removed through their contact us and now the registrants email. Each backlink is from a unique domain – there is only 1 link but a 0 Trust from Majestic. When I look at the site/s there is just a page but also an option to buy pages domains (up to a million).
Have any of you guys come across this site?
Is it negative seo?
How would they have got my domain to backlink too?… is it negative seo