Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e84c160564c42a…

MALICIOUS

PDF

57.6 KB Created: 2020-08-10 14:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 603485b4b88dc22fa2755607652b7155 SHA-1: 23a40a5fb733e5459ae04cece55e732bfce46b78 SHA-256: 33e84c160564c42a966567b2c9fd1120537131a7009bdd0b852d765880a8d95f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One primary URL, 'https://ttraff.com/pify?keyword=types+of+adjuvants+in+immunology+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same lure text, reinforcing the malicious intent of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=types+of+adjuvants+in+immunology+pdf
    • http://fazimuzad.jennyrmorrispwms.org/uploads/1/3/1/4/131406436/7400197.pdf
    • http://files.susanarondon.com/uploads/1/3/1/0/131070367/wisutifa.pdf
    • http://files.merionvillage.org/uploads/1/3/2/8/132814935/cb1d90.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/37713398979.pdf
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/axel_vervoordt_wabi_inspirations.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86593634255.pdf
    • https://cdn.shopify.com/s/files/1/0445/5170/0644/files/financial_econometrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/4196/4710/files/xupuzejadojagipinevuvaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/2715/9448/files/nenozadule.pdf
    • https://cdn.shopify.com/s/files/1/0435/6364/7131/files/55698827337.pdf
    • https://cdn.shopify.com/s/files/1/0438/2919/8998/files/fudelezeteju.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/harbor_freight_horizontal_band_saw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/bixojozupuzirirolu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1615/7344/files/pptidos_y_enlace_peptdico.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/rifurawoke.pdf
    • https://cdn.shopify.com/s/files/1/0431/2960/2205/files/volarilumefakubixu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5537/2695/files/41653095798.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a080.bin
4475e69363d93c23f201c7735e4e2826327dfcdced567d36f033e94b2ed4d08e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA080 5452 bytes
font_01_sfnt_off0000b317.bin
c50d828d313f5cf4bc7bc8d6b2e4af764b28b7064301225a7803a6f5ebfcd46f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB317 11480 bytes

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