Is aiding a friend in preparing a scientific research paper and writing large parts of it considered a sin for the helper? Is there a legal transgression in that for the author of the research? And are the funds he obtains as a result of that suspicious?

It is not permissible for a student to rely on others in preparing their research, especially concerning tasks they are required to do themselves, such as drafting information, extracting results, and organizing ideas. This is because it constitutes cheating and injustice, leading to them being awarded a grade they do not deserve. If someone writes most of the research for another, this is considered forbidden cheating and cooperation in sin. This act must be ceased, and if promotions or benefits result from this research, they are not permissible for its owner as long as they did not conduct the research themselves as required.