Malicious PDF — malware analysis report

Static analysis result for SHA-256 253e4acd5d1f018a…

MALICIOUS

PDF

38.0 KB Created: 2020-10-28 02:16:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2a0937c2b73a22aa4a7cb77374f2fc98 SHA-1: 9847262a788d5fdb5799e72c65a0ebcc36480288 SHA-256: 253e4acd5d1f018ab6e50286512ff0fe8d97b1ea05a6df63da1bb6284601c730
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/123?keyword=xfinity+dc+phone+number'. The document body also contains this URL, suggesting the PDF is designed to trick users into visiting a malicious site by impersonating a search result. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.club/123?keyword=xfinity+dc+phone+number In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406806/normal_5f92024b0242e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382974/normal_5f8c726fa351b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384645/normal_5f8c93d1645ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5f8f328aa0250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5f888f1b9b129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414174/normal_5f95b744c04e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_5f8bcb7704541.pdfIn PDF document text
    • https://bawilawuvibowe.weebly.com/uploads/1/3/4/4/134401702/72ce5a65.pdfIn PDF document text
    • https://zarurirabug.weebly.com/uploads/1/3/4/3/134355130/1158701.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wovigebi/sexawugezejoxanesalimo.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/notusomivo.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/jexonuxogi.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/atraumatic_extraction.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/advanced_level_english_test_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/19420821415.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/administrao_da_produo_livro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc36d4a-daeb-41e6-8e2f-9414cddaea36/nike_aire_max_tailwind_6_negro_women.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9d014bd-b99f-4dc5-a1ba-92b99ea9aed0/20543722403.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_off000056b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56B6 5192 bytes
SHA-256: fe8fc65f031efe3983fbdbe3ffdf7eff8eaf1c09d286e88c2f61d75a5160d98f
font_01_sfnt_off0000682f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x682F 10456 bytes
SHA-256: ffb937f9bc94c38242b8277ed8e726653e5538fc1f4df087749fef1ac050e10f

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