Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed2230c1dcc435c…

MALICIOUS

PDF

55.7 KB Created: 2020-11-03 21:17:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 607041c76ef1ccc19dcfa4262900b107 SHA-1: 492b43cd0091dc4d48ac409ed42f6c0ffe616dd2 SHA-256: 3ed2230c1dcc435c483944d4cb8fc3a43adcb925bbc23b5bc47cdf7a39d4eadc
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, including one pointing to a known malicious redirector. This suggests the document is part of a link farm or phishing campaign designed to redirect users to malicious sites. No scripts were extracted, but the presence of numerous links and the ML classifier's high confidence indicate 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://ttraff.link/123?keyword=handler+appliance+atlantic+city In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369493/normal_5f9bcdee80fe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414498/normal_5f9b4706c8288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388612/normal_5f9e41ae0484a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379236/normal_5f8f23cf32e2a.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/duzugojakoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378406/normal_5f8a9613a2c7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388293/normal_5f9442a7b60fa.pdfIn PDF document text
    • https://xaxexapiro.weebly.com/uploads/1/3/1/4/131453807/kebinufu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405654/normal_5f9691250a270.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/9c8dbb67-a44f-4f6a-ac93-3ecfefb61741/64432329881.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b38ed52b-c186-47c1-adc2-65e8ce8b48ac/25448636157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fcba2d8-36b0-4255-beea-a9609a63a331/cover_letters_about_yourself.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/neludibefuboza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/036eda91-dea0-4eb5-9435-ed0c2f977bf3/xafesajunikawusigaral.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/accounts_interview_questions_and_answers_for_freshers_free_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AC 4952 bytes
SHA-256: b154c498b97209be21d93b0ba0b2c15916c2d195b72b88c67ca4e3f0ed62ec56
font_01_sfnt_off00007594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7594 7052 bytes
SHA-256: 4ea39ac015eb99f47227ba66e21c929697e27c703d5ff1fb6c7dacd43b8f1d8e
font_02_sfnt_off00008c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C55 13036 bytes
SHA-256: c340b51f21ca4d45b11418ece1b49d12746a986d8b8301059a92108ad06e794c
font_03_sfnt_off0000b57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB57A 18304 bytes
SHA-256: 1944483dc97196484f489c7e8cfb8bcea80e31ca03d26fa222f6b79f7d3c2f9e

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