Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b631a0864f09690…

MALICIOUS

PDF

42.7 KB Created: 2020-11-07 15:45:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d613ae605cf63f6c9f814fe0eb5e0abd SHA-1: 7157aaf1146fd1befc9c3b3301750745ab1b5bef SHA-256: 4b631a0864f0969070f674068a1acc16b777e4bf30db38ae2942c2740f0c4da5
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded URL `https://gettraff.ru/123?keyword=shawnee+county+register+of+deeds+phone` is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious link suggests a phishing or malware delivery attempt.

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=shawnee+county+register+of+deeds+phone In PDF document text
    • https://kuvanipugeva.weebly.com/uploads/1/3/4/4/134445248/72a3dc3b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f9487e19e813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405639/normal_5f9236608514b.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/380d9f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453335/normal_5fa1cef544c71.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/28a6b45e-ed7e-45b3-afbd-46046fb8b3ab/50186931290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/040a0bea-83e6-419b-a93b-68daee64de36/yamaha_g22_gas_golf_cart_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78d3ebf0-c300-4540-86a1-1db449d42dc8/mubovun.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/3690968125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26533000-e0c3-4fd3-91b4-56079efc83f2/pedimafudemobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4798c8d8-3af5-45cc-90a6-3107b1b93fd3/door_open_indicator.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_off0000656e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656E 5680 bytes
SHA-256: 8948444fb6234bf58e7db757c3e9ec4c18f777c78e6500b92779904d3179c90b
font_01_sfnt_off000078dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78DD 11048 bytes
SHA-256: 9d84f53bbfd2385c034490eb27fd1d43875aa524b5ac9f6160c0490aa6fa2b78