While reading fan translations online exists in a legal grey zone, downloading and distributing PDFs is much more likely to trigger copyright infringement notices from Japanese publishers like Kodansha or Shueisha.
A "novel kudasai pdf" refers to a digital version of a novel or book in PDF format, often requested or sought after by readers through online searches. The term "kudasai" is appended to the search query as a polite expression, indicating that the searcher is requesting or asking for the novel.