Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bbbafec2e7dc5c3…

MALICIOUS

PDF

47.3 KB Created: 2020-10-28 15:37:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2467cd5381ee64c14dc6b6720dfe07e7 SHA-1: 2af47e346c4fd7c592c2f1c476b25748ce35a576 SHA-256: 2bbbafec2e7dc5c37408b2b296ed573574dae5417094a22b92ec129b526cc09d
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/aws?keyword=what+is+considered+an+integrative+review+of+literature In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_5f947b24b873f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5f95aafe2b3f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f86fa9a5ceb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371787/normal_5f928c118acfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f9467f5ce55c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388052/normal_5f8d110f560b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_5f985763b70ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_5f9390fa3da47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1673/0799/files/hero_line_wars_starlight_build_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a812e7a-3f06-4f14-8b78-43db1def349f/vugoralutokuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1696/9149/files/depositional_environment_of_sandstone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99e98314-1c0b-4252-b5e9-fadd4b614ff7/55003017928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2523/5612/files/mn_sp_g_cho_tm_hn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2648/9249/files/19999547966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35cce3ba-2471-4788-b2a9-80abc83a4341/salatovarodut.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/overview_of_the_catholic_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/aggressive_behaviour_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/11430961863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad4cfb94-9fa2-4cca-adba-91db22b686fd/buxowalirixivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0686e5e3-aa51-44df-a447-2f6093a41b50/bunibepo.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/barriers_of_cross_cultural_communication.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_off000076e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E4 5448 bytes
SHA-256: ffb9b3d50a00fd893d1a855f60cd9b26efeaf95319e60ab3ff119d451cc9e132
font_01_sfnt_off00008982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8982 11796 bytes
SHA-256: a3ea006802553f13110cbb9df03181bdca60651332412be268e4292c2947add9

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