While it is rare for an individual downloader to be sued (music publishers typically go after the uploaders or the hosting sites), it is not impossible. Copyright holders can sometimes trace IP addresses via torrents associated with PDFcoffee links. Universities have strict academic honesty policies that penalize the use of pirated educational method books.
Based on recent search results, several Hal Leonard titles are commonly found on these platforms, including: The Producers Sheet Music : Piano/vocal scores for the musical The Producers are available on Student Piano Library hal leonard pdfcoffee