I know budgets are tight. If you search Google or Reddit (r/LearnJapanese), you will find links to shared Google Drives and illegal uploads.
Instead of "N4 PDF," search for "Minna no Nihongo Chukyu I PDF" or "Minna no Nihongo Intermediate I PDF." minna no nihongo n4 book pdf
If you have finished Minna no Nihongo I & II (the Shokyu / Beginner series), congratulations! You are officially at an N5 and N4 level. I know budgets are tight
Is the "Minna no Nihongo N4 PDF" Right for You? A Complete Guide to the Chukyu Series minna no nihongo n4 book pdf