Malicious PDF — malware analysis report

Static analysis result for SHA-256 3485850f16256bb6…

MALICIOUS

PDF

43.9 KB Created: 2020-11-02 16:25:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 70b599ac87d12d6dddfa03c9bdd3bdf3 SHA-1: 66daad3e95ece06031f73baeabfc966c935ebde3 SHA-256: 3485850f16256bb60d3a32cb2deef516cb06db3d3f2455f2f16152821927433d
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.me/123?keyword=2005+nissan+titan+factory+service+manual In PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/vorukekox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390323/normal_5f993e0c2b5ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/gatineau_park_summer_trail_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3884/2266/files/56073090524.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/effective_go.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/bernardino_ramazzini_libro.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/congestive_heart_failure_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/italian_for_dummies.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A68 5492 bytes
SHA-256: 96e68d55e2a9da2b48c0f40e0bbda94c612ba154b94b2d2fb7d65d0b201346cb
font_01_sfnt_off00007d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D13 11012 bytes
SHA-256: 8e7dae6725ce5a0c719ee5a7abaca5cdcb6903c56b1cb2de27efc134105ccecb

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