Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf897d17d83f4b9…

MALICIOUS

PDF

367.6 KB Created: 2015-08-21 09:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: b31f4752960af81273577af368fb2752 SHA-1: 6ca3c9ec7fe8fc263b89e641eb72856b6476c52c SHA-256: 2bf897d17d83f4b9138a4456953d5a02200c95dac6c0ef2b27a6e0a663ad5720
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains a critical heuristic firing indicating a redirector link to known malicious infrastructure. The primary IOC is the malicious URL identified by this heuristic. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector is sufficient to infer an attack pattern aimed at luring the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 2

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://botcraftman.ru/?lip&keyword=english+in+mind+workbook+2+%D0%BE%D1%82%D0%B2%D0%B5%D1%82%D1%8B&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654776_skachat_vse_serii_hb_cherez_torrent_v_horoshem_kachestve.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654744_skachat_mod_tropik_kraft_na_maynkraft_152.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654794_da_pridet_prorok_2_dlya_stalker_zov_pripyati_skachat_torrent.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056f38.bin
43a749187d22b08dda97b7706a86fbc050b5b4a2666f7b8a72500f9fb096a463		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56F38 10680 bytes
font_01_sfnt_off00058db1.bin
dff05f5717d9dc7002ffe58378f0bed35d0b32cdfc42ddd9d5429efbbe307cde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58DB1 15608 bytes

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