Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a9896d7bc31eaf…

MALICIOUS

PDF

353.8 KB Created: 2015-08-21 09:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 1aaedac7a7a79a041ed277ecfee7afef SHA-1: 9b7ed234a6877120118a8553d88028682a9730e3 SHA-256: 88a9896d7bc31eaf0d35698659113841dc491ab93a2b6a9d21da7377edefe13e
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, botcraftman.ru, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, contains keywords related to 'terraria 1212 rus' and application metadata suggesting it was generated by wkhtmltopdf, which can be used to create malicious PDFs. The presence of embedded URLs and the critical heuristic firing confirm the redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+terraria+1212+rus&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654751_onlayn_bot_dlya_sluysh_cho.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654681_chit_na_bessmertie_v_payday_2.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654722_vyacheslav_dobruynin_diskografiya_skachat_torrent.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053d8b.bin
8d8bb66f3b45ac757fac3c4fd53b06bc61487e8664113e4c5cc8fd301bad765e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53D8B 8552 bytes
font_01_sfnt_off00055594.bin
80e19791faff7b41b0d0054a64463a8b1fd2ab4daffc158984184d5412830e22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55594 16404 bytes

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