Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ddd9c4347f948f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-11 04:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1cea35ee84dc63cc9542b00d0098933 SHA-1: 9eaf6a58a8ef07d4584283970ce68c51566a794d SHA-256: c4ddd9c4347f948f65e5602e56e84b7339fc8eb1f3fbd2d9aa1ca7d377b3a410
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented within the document body, disguised as a link to a book. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to improve search engine ranking for malicious content. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 https://ttraff.com/pify?keyword=beginners+book+of+salah+pdf
    • http://files.argoscanada.com/uploads/1/3/1/4/131407138/sikorejapujaxa_vadulivat_takot_wugisadonip.pdf
    • http://files.fuzzballrescue.com/uploads/1/3/2/8/132814050/7496028.pdf
    • http://files.davesculley.com/uploads/1/3/1/4/131482976/6940474.pdf
    • http://files.gallivantinggoddess.com/uploads/1/3/0/7/130775725/peruw_silafoteba_basijaluxa.pdf
    • http://files.bremnerglassandglazing.com/uploads/1/3/2/6/132696077/balusosodezeba.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6721/files/zawatixusobifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2327/7973/files/integral_calculus_drive.pdf
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/d_d_monster_manual_4e.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5750/files/florida_panthers_schedule_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0439/5941/9038/files/curso_aprendizajes_clave_primaria.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/modelo_canvas_explicacion.pdf
    • https://cdn.shopify.com/s/files/1/0438/2133/4688/files/nepuwega.pdf
    • https://cdn.shopify.com/s/files/1/0430/4112/8601/files/77043169065.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4717/files/63540663646.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32773531818.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/zukowibupoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/kekofikuvob.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006532.bin
fa23e490b5c2968e9ca390c9dabf044324fcd912a48d41be21590258347824d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6532 5556 bytes
font_01_sfnt_off00007808.bin
e2824947395086a0904a5e8d154cb9f4517060cc8858396e05e4692f7c1f9d1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7808 10552 bytes