Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf147036cd630a4…

MALICIOUS

PDF

43.0 KB Created: 2018-11-14 08:21:17 +03:00 Authoring application: LaTeX with hyperref package (via xdvipdfmx (0.7.8))
MD5: f29f8a838bb60467a9450904e3482039 SHA-1: 33c30c3b3731ea694822848d4673a78640ed8420 SHA-256: bbf147036cd630a43c3256cca1bcdbb90722982e2fb09c9a5b1c9e477b3c5351
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF was flagged by a machine learning classifier and a critical heuristic for containing a large number of external links. The document body, though heavily obfuscated, contains numerous URLs pointing to other PDF files on the domain www.gorillawalker.com. This suggests the primary purpose is to act as a link farm, potentially for SEO manipulation or to distribute a wide array of content, rather than a direct exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8856

Heuristics 2

  • 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 http://www.gorillawalker.com/mercenaries-a-guide-to-private-armies-and-private-military-companies.pdf
    • http://www.gorillawalker.com/cairo-city-of-art-and-commerce-centers-of-civilization-series.pdf
    • http://www.gorillawalker.com/wallpaper-city-guide-copenhagen-wallpaper-city-guides.pdf
    • http://www.gorillawalker.com/the-gathered-and-scattered-church-equipping-believers-for-the-21st.pdf
    • http://www.gorillawalker.com/a-little-night-music-advance-teaser-one-sheet-poster.pdf
    • http://www.gorillawalker.com/best-of-peter-tosh.pdf
    • http://www.gorillawalker.com/visual-dictionary-of-the-human-body-eyewitness-visual-dictionaries.pdf
    • http://www.gorillawalker.com/american-folk-art-and-furniture-formerly-in-the-collection-of.pdf
    • http://www.gorillawalker.com/thomas-kinkade-painter-of-light-with-scripture-2016-monthly-pocket.pdf
    • http://www.gorillawalker.com/parenting-on-the-autism-spectrum-a-survival-guide-second-edition.pdf
    • http://www.gorillawalker.com/mindset-the-new-psychology-of-success-kindle-edition.pdf
    • http://www.gorillawalker.com/the-big-ass-book-of-crafts.pdf
    • http://www.gorillawalker.com/foundations-of-physical-chemistry-oxford-chemistry-primers.pdf
    • http://www.gorillawalker.com/dallas-wedding-planner.pdf
    • http://www.gorillawalker.com/introduction-to-electro-optical-imaging-and-tracking-systems-artech-house.pdf
    • http://www.gorillawalker.com/the-home-brewer-s-guide-to-vintage-beer-rediscovered-recipes.pdf
    • http://www.gorillawalker.com/crop-stress-and-its-management-perspectives-and-strategies.pdf
    • http://www.gorillawalker.com/murder-in-the-smithsonian-a-capital-crimes-novel.pdf
    • http://www.gorillawalker.com/to-baby-with-love-a-baby-record-book.pdf
    • http://www.gorillawalker.com/do-they-know-about-the-children.pdf
    • http://www.gorillawalker.com/electron-microscopy-principles-and-techniques-for-biologists.pdf
    • http://www.gorillawalker.com/the-practical-art-of-motion-picture-sound-book-cd-rom.pdf
    • http://www.gorillawalker.com/the-deceit.pdf
    • http://www.gorillawalker.com/the-sage-handbook-of-organization-studies-sage-handbooks.pdf
    • http://www.gorillawalker.com/the-rise-of-the-blogosphere.pdf
    • http://www.gorillawalker.com/masks-of-wedlock-studies-in-seventeenth-century-dutch-marriage-portraiture.pdf
    • http://www.gorillawalker.com/design-science-research-methods-and-patterns-innovating-information-and-communication.pdf
    • http://www.gorillawalker.com/next-generation-course-redesign.pdf
    • http://www.gorillawalker.com/systematic-approaches-to-argument-by-analogy-argumentation-library.pdf
    • http://www.gorillawalker.com/business-restructuring-an-action-template-for-reducing-cost-and-growing.pdf
    • http://www.gorillawalker.com/a-soldier-s-letters.pdf
    • http://www.gorillawalker.com/winner-take-all-politics-how-washington-made-the-rich-richer.pdf
    • http://www.gorillawalker.com/life-s-america-family-and-nation-in-postwar-photojournalism.pdf
    • http://www.gorillawalker.com/short-summary-of-the-history-of-haiti-from-1492-1949.pdf
    • http://www.gorillawalker.com/the-talker-collection.pdf
    • http://www.gorillawalker.com/altruism-and-aggression-open-learning-units-in-social-psychology.pdf
    • http://www.gorillawalker.com/the-blackwell-dictionary-of-western-philosophy.pdf
    • http://www.gorillawalker.com/growing-up-iowa.pdf
    • http://www.gorillawalker.com/nobody-likes-you-inside-the-turbulent-life-times-and-music.pdf
    • http://www.gorillawalker.com/the-least-of-these-in-colombia.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.aiim.org/pdfa/ns/extension/
    • http://www.aiim.org/pdfa/ns/schema#
    • http://www.aiim.org/pdfa/ns/property#
    • http://www.aiim.org/pdfa/ns/id/

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