Avoid random PDFs from file-sharing sites (like ed2k or torrents) that claim to be "Official Oxford Russian PDF." Many contain old Soviet-era word lists that include words like "collective farm" ( колхоз ) but miss "smartphone" ( смартфон ).
If you are looking for specific documents or PDFs to study or reference, these are the most prominent versions available: Oxford 3000 Russian Pdf
Oxford 3000 is a curated list of the most essential words for English learners, selected by language experts for their frequency and usefulness in everyday communication. While officially an English-language resource, various "Russian PDF" versions have been developed by the community to provide translations, transcriptions, and CEFR-level categorizations for Russian-speaking students. Avoid random PDFs from file-sharing sites (like ed2k