Malicious PDF — malware analysis report

Static analysis result for SHA-256 7666cf9a649ee60c…

MALICIOUS

PDF

43.8 KB Created: 2020-08-20 18:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 873b6839e870749103a02e4855223cae SHA-1: 1e6cdafbc981d1181f5babad3ca2383ded5e3552 SHA-256: 7666cf9a649ee60c01b1ba8f858a3b411c54a30cd0b17493b24ff0f5920ae93b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains numerous embedded links, including a critical redirector link to ttraff.com, indicating a malicious intent to direct users to harmful infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests an attempt at SEO poisoning or a sophisticated phishing campaign. The ML classifier also strongly flagged this document as malicious.

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=black+sheep+cycling+size+guide
    • http://files.mckinneyquiltersguild.net/uploads/1/3/0/8/130874207/2449c3a58288a.pdf
    • http://files.coolcaribbeanvacations.com/uploads/1/3/0/7/130775837/c945b79.pdf
    • http://files.drumartist.net/uploads/1/3/0/7/130775413/2446560.pdf
    • http://files.emilysasia.com/uploads/1/3/1/4/131454286/zoxunutakava.pdf
    • http://pezuvu.mollymcdavittcounseling.com/uploads/1/3/1/4/131453215/7fb911b682.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/base64_encoded_file_php.pdf
    • https://cdn.shopify.com/s/files/1/0437/9623/4400/files/24034835199.pdf
    • https://cdn.shopify.com/s/files/1/0431/9140/2660/files/51741226440.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8179/files/7167439345.pdf
    • https://cdn.shopify.com/s/files/1/0451/7157/2885/files/android_game_controller_argos.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/vuzupilalixagujaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0584/5397/files/48377487562.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/seguros_banorte_informe_medico.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/80238334945.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/39415409064.pdf
    • https://cdn.shopify.com/s/files/1/0434/1697/7559/files/56923296426.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5804/files/80769231184.pdf
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/78873560643.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_off00006c1e.bin
d5f2d13d267c70c10d1560ef6238db8e9b7226bea74c60bb8307c5a53bce4db4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1E 5504 bytes
font_01_sfnt_off00007ee0.bin
5bf110ae55ce980144f93d9adf1882395bfb00e11667aee5901effd77957d99f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE0 10280 bytes

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