Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d8d09b11b9d5b7…

MALICIOUS

PDF

68.1 KB Created: 2021-01-08 17:12:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2a22a327cb4ae314ae0dbbbb0f10a0de SHA-1: 734c6bf7b0323cd758b138e8a4c97bf614eaf037 SHA-256: 93d8d09b11b9d5b77681e828541752b67d81a85ae388c30bf149e7f68e03c02e
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru'. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a harmful site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/aws?utm_term=13+colonies+blank+map+worksheet In PDF document text
    • https://static.s123-cdn-static.com/uploads/4475725/normal_5fe0261883bb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446646/normal_5fe16d566bf9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394066/normal_5feeaee55c39d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451374/normal_5fe85a3849bab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wupixufekijax/il_cantico_delle_creature_branduardi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb82c58b-8420-420a-887c-a51032f88e0c/43735300658.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/jomakakamozage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d40414d-cfc1-4666-8bbf-5987f6712478/22053469466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f06198d-d31f-4a7f-b6a8-db1639492e1e/36.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9e9f060-590c-41d2-a7d6-242f23563dcf/11976682251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c41ecb3b-5bd6-45f5-a659-ef7bcb7ede39/79687975431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b35a477d-264f-49b9-8063-d5b935728d78/25414664461.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB10 5380 bytes
SHA-256: bb2a499cbdbccc73da77c30c78e1212bfc8dc4a88932d530e379654e6db66c34
font_01_sfnt_off0000cd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2A 12560 bytes
SHA-256: f4261898d7ff08d18830c8d55b3b8259f6012dfd122f223dc4fef6f13c9d3be0
font_02_sfnt_off0000f5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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