Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa69e6e7df5beb5c…

MALICIOUS

PDF

45.9 KB Created: 2020-11-02 20:55:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 43795ddd27b7f553dddd81c55b671530 SHA-1: d3989927033e4e6c1a8355e2059d4fe447948027 SHA-256: fa69e6e7df5beb5c1babac5e604656abd1a1179bb24b020bcd5a9b50fd27b3f2
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/123?keyword=peterson+guide+to+rocks+and+minerals In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408853/normal_5f9da3af6243f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411483/normal_5f9f0884ab7e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382614/normal_5f8f192f19042.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6a473297-8f7e-4792-864f-8aff1625fa56/wamebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/5465/1294/files/55029351027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff2760dc-891a-401d-9366-bf5efd2cdc19/reluxuruv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3092/8289/files/nobody_knows_the_trouble_ive_seen_disney_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5322/3588/files/otitis_media_guidelines_philippines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0233/7704/files/borderlands_xbox_360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/567a5b32-891a-4b9e-9b7e-fbeeb8278c8b/metelagusubisinujuxusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/30510369361.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000677c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x677C 5208 bytes
SHA-256: 1b0efb8dbd0a00036dfc342f4076746a31fc995206e9afc9fd518ec6ae166962
font_01_sfnt_off00007919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7919 10288 bytes
SHA-256: d31d47ca7089e359fd3cb90fb71b5a190b43dc7c3920f98fd8de49828bed08d3
font_02_sfnt_off00009c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C50 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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