Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd25c628b5e66b9…

MALICIOUS

PDF

38.7 KB Created: 2020-10-27 13:28:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b236c496ef189fa6e67cca462dcad4d7 SHA-1: 98ecc2ef800556ae6388e816b87233ec9be5e232 SHA-256: 7fd25c628b5e66b9147092f614ef826ac19581a49769007a1b117dd84c0685b8
154 Risk Score

Malware Insights

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

This PDF file contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://cctraff.ru/strik?keyword=young+jeezy+thug+motivation+101+album+download'. The document body also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to Shopify and AWS, but one critical URL is identified as malicious. The ML classifier 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://cctraff.ru/strik?keyword=young+jeezy+thug+motivation+101+album+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407081/normal_5f925553c903f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406228/normal_5f964ee3f34da.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/1/0496/2815/1959/files/comptia_security_sy0-401_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/zemurewovis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2891/2040/files/jizezenalaxuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/9718/0310/files/20139592528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8526/1717/files/wapamoxegojegisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6256/6298/files/kigufuwigaxojunotuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/1480546258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7658/2552/files/47108979113.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/mewewozarupizamug.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/65894679765.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/pdf_file_test_print.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/54755082672.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/articles_about_interior_design.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/marketing_kotler.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/basics_of_mobile_communication.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/six_kalma_in_arabic_with_urdu_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/gastrointestinal_system.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/urdu_numbers_1_to_100_in_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/443abbd4-48a5-4a3e-b291-9f5971a2b817/massey_ferguson_30_industrial_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db64ce11-08e1-4118-afae-29cc97a636b7/jowixexelopitufewata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ab23f29-aa88-468b-a786-52f6be344171/kara_kpr_narlktr_indir.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_off0000554d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x554D 5640 bytes
SHA-256: d356d63f9226700a9064ab27979a33a719350a453de1996e193205278d721f5c
font_01_sfnt_off00006884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6884 10896 bytes
SHA-256: 27f1669f4bbd6d37541f0a8e796eb176bc6a3c8974fcb27efb1304234ee6da9a

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