Malicious PDF — malware analysis report

Static analysis result for SHA-256 770004036ad3f75e…

MALICIOUS

PDF

44.9 KB Created: 2020-08-23 07:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db8717471a0ed371ee70430965e80ade SHA-1: d434643d65228e6d11c5435376c8ac0058bf1fcb SHA-256: 770004036ad3f75e8d1c3cfdd48f5c224be1dc02b40266d68dea76a63ea54303
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to potentially malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a deliberate attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML classifier also strongly flagged this PDF 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.cc/pify?keyword=ariens+snowblower+manual+926le
    • http://kunosat.undralandskennel.com/uploads/1/3/1/0/131070450/tofobupubuv.pdf
    • http://files.vn.seameocelll.org/uploads/1/3/1/0/131070212/a44622c38.pdf
    • http://wipox.starspeedwaynh.com/uploads/1/3/1/0/131069899/nexapo.pdf
    • http://senubo.prolyticsconsulting.com/uploads/1/3/1/4/131406710/ee1d2.pdf
    • http://linomix.thevivaciouslivingcompany.com/uploads/1/3/1/8/131856408/denikilub-mojuxixom-bopeneponelu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/falofolumolivile.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8913/files/kitufomakofimezavuwobaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0523/8692/files/vurazidademefasigeripi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4843/4840/files/installing_crouton_on_chromebook.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/calcium_channel_blockers_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/kiwosazixifilanu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5886/files/kobuwomovub.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/xitojek.pdf
    • https://cdn.shopify.com/s/files/1/0428/6912/9372/files/present_simple_affirmative_exercises_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wanojexabe.pdf
    • https://cdn.shopify.com/s/files/1/0435/2173/6859/files/59995881233.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/7996/files/trigonometry_cynthia_young_3rd_edition.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_off00006279.bin
132a6a4d1f420e9ce3706eff844c949a515732b9d4216dd617fc70b45c8861da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6279 5496 bytes
font_01_sfnt_off00007510.bin
e4d565c2a9a4dd251adb07d6ef6734fc66826ed610a3895346ce65f90a0b0159		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7510 15712 bytes

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