Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9ac571c071b720…

MALICIOUS

PDF

44.1 KB Created: 2020-11-03 10:23:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 655ccd9a21e1d5d68978724d104d1e2c SHA-1: bb49241dc4da025209943b1c68e2dbd2060420e3 SHA-256: 5b9ac571c071b72087fa3660edd7754c9adbcc70cbf39be2eb8fa30a4646fc80
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to known malicious redirector infrastructure or are part of a link farm designed for SEO manipulation. The primary malicious URL identified is 'https://gettraff.ru/strik?keyword=flash+games+super+mario+64', which is likely used to redirect users to further malicious content. The ML classifier strongly indicates malicious intent.

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/strik?keyword=flash+games+super+mario+64 In PDF document text
    • https://dasitonaz.weebly.com/uploads/1/3/4/3/134379343/9c7edb154f73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382772/normal_5f9c422f57e4a.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/6842238.pdfIn PDF document text
    • https://besuxape.weebly.com/uploads/1/3/4/3/134374749/murulujexasagixa.pdfIn PDF document text
    • https://wemugevesusufe.weebly.com/uploads/1/3/4/4/134467109/9449921.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d227ee73-f6b1-47b3-a374-b46f8e361493/download_song_aye_mere_humsafar_ek_zara_intezar.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/darifabimibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/872c7985-39fb-4a03-8c46-09950b4ef1ab/luwimumafozijodudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70a34747-6c86-4033-a84b-dda91afae352/rukuzovadenozaxow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d0cddf-a5ad-4970-9c57-37083e505e8d/integrated_korean_beginning_1.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/top_worst_people_on_the_earth.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/conducted_emission_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f1e8f57-d919-4e5d-be5e-b07c8135da5c/mafeminuwiziniduxereb.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_off00006d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3E 5432 bytes
SHA-256: a42501406716ca52bc3342c7645851d4a2c8190cd0d1ecb09f78a799750e5f68
font_01_sfnt_off00007f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F93 10456 bytes
SHA-256: 8bb52663fd95bfc5cf23392a64101c2a254f5fc1fdbc6b6978ccf71b897f2925

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