Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f164ca122dadfec…

MALICIOUS

PDF

49.5 KB Created: 2020-09-18 14:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37d9873bfd2416caf7cd3378139242dd SHA-1: 2ea08221a7e7a024ea11bbaa4e371279828ad70e SHA-256: 0f164ca122dadfecaf1b1d9ef95c73063be0324ccff8a92559c2214f402379af
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to malicious infrastructure, disguised as a download for a game mod. The PDF also hosts a large number of links to other PDFs, likely for SEO manipulation or to spread malicious content. The ML classifier strongly indicates maliciousness.

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.link/wix?keyword=the+sims+mobile+mod+apk+unlimited+money+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/6515/4463/files/nvidia_geforce_gtx_960m_driver.pdf
    • https://cdn.shopify.com/s/files/1/0436/2603/7411/files/30823554643.pdf
    • https://cdn.shopify.com/s/files/1/0433/7323/2291/files/bridges_math_grade_3_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/8803/6505/files/cardiogenic_pulmonary_oedema_in_dogs.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/binder_cover_templates.pdf
    • https://cdn.shopify.com/s/files/1/0440/7400/8741/files/24669709473.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3996/files/54832861394.pdf
    • https://cdn.shopify.com/s/files/1/0440/3052/5590/files/hyperbole_in_poetry_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3140/files/96457813628.pdf
    • https://cdn.shopify.com/s/files/1/0435/3835/0231/files/86458272014.pdf
    • https://cdn.shopify.com/s/files/1/0434/0065/9100/files/vewef.pdf
    • https://cdn.shopify.com/s/files/1/0482/6900/0865/files/bay_to_breakers_2017_dates.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8036/files/indonesia_archipelago_of_fear.pdf
    • https://cdn.shopify.com/s/files/1/0434/8982/0836/files/87181570969.pdf
    • https://f547354a-f40b-4a5a-85cf-b4834985cc75.filesusr.com/ugd/17ce20_4cee2fa4bb3e4c4ca340e8825d479365.pdf?index=true
    • https://52c61f1b-cbc5-4a8b-96f0-40f5f7875a03.filesusr.com/ugd/a01749_c8fd52d3300944399763ea8d01e6a95d.pdf?index=true
    • https://8f3c1d86-6145-4829-a19c-5760adeeaab9.filesusr.com/ugd/739437_82bc9dc34b764cd2b43e1f425607516d.pdf?index=true
    • https://90ec8512-fe9c-4d62-b138-a9f8769fbf5d.filesusr.com/ugd/49488e_6c6bba41bd88487595f627a5de210221.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073eb.bin
b1b7ffc512f4d2c7a9bd6085f704ebb97d4d71ea4a8e32de72acd7961ec6903d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EB 5332 bytes
font_01_sfnt_off000085fb.bin
71574deaa71333420f268bda3a3622b5a6d530d62d92e57d75e3084f6118270f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85FB 10612 bytes
font_02_sfnt_off0000aa30.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA30 4324 bytes

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