Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da9ba289765bf48…

MALICIOUS

PDF

34.8 KB Created: 2020-10-30 02:28:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d15f19dc1337c043a7ee2f3d3fad51ac SHA-1: 79ed8c7418736663acb786306c68413d901a18bd SHA-256: 9da9ba289765bf482f9ce989478a68adddcc762e6675cf14ffb733789d692747
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://gettraff.ru/123?keyword=selma+the+bridge+to+the+ballot+worksheet+answers'. The ML classifier also flagged this PDF as malicious with a high probability. The document body, though heavily obfuscated, contains references to a worksheet and the malicious URL, suggesting a phishing or social engineering lure.

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://gettraff.ru/123?keyword=selma+the+bridge+to+the+ballot+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410222/normal_5f948f73e2207.pdfIn PDF document text
    • https://nubojubixuxo.weebly.com/uploads/1/3/1/4/131410311/nonotanesajajabad.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/tigosorivibisakoxu.pdfIn PDF document text
    • https://duxataravur.weebly.com/uploads/1/3/4/0/134017775/texokananowor.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/736670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f876438af848.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/pazifetanegapu/jemevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05975586-a056-48e4-8401-9fd60ef9544f/85759624493.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/binomial_calculator_online.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/alberta_program_of_studies_social_studies_grade_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a1c81f-e1ff-4ad6-97b5-89525e72e82f/xomuvevizosilaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d9007df-a377-41ca-bfbb-d390fdf7228e/fugotukodimiredizog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bae0b82b-8ba9-4734-a437-6b1079ef7e2a/xikisina.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_off0000490b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x490B 5636 bytes
SHA-256: 9f0f807a85fb4c34d7415bd2ca8e7688c01dee2018d8bd1a8119f5c68581f26a
font_01_sfnt_off00005c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0E 9880 bytes
SHA-256: cf071daf99e15c1f50846a6df606c2cb0004c86f1940c9cd71e7a491991af162