Malicious PDF — malware analysis report

Static analysis result for SHA-256 0efc8a1186d4707a…

MALICIOUS

PDF

40.2 KB Created: 2020-11-04 10:04:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bdbae95046dfd2f7b932e054e079c69d SHA-1: 3b03e06d8ba6cd21ec5df7ef0f0b51f4da511a00 SHA-256: 0efc8a1186d4707ad5e34198e724f4a0cbe6c29270ba7855b3a8b1fc3eb77399
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://cctraff.ru/123?keyword=double+displacement+reaction, is the primary indicator of malicious intent. While no scripts were explicitly extracted, the nature of PDF redirects often involves JavaScript to facilitate the redirection, hence the inclusion of T1059.007.

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://cctraff.ru/123?keyword=double+displacement+reaction In PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/figasivumo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373240/normal_5f8fb73848957.pdfIn PDF document text
    • https://doliwejivus.weebly.com/uploads/1/3/4/3/134353379/dotesim-gowelexujujogi-xegevegiziv.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/satekusaro-wigipisafex-badar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f893b9dd51f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_5f8d2b0aa4953.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409114/normal_5f9fbf10b2450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_5f90a6bb6cc41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f882bf7b0630.pdfIn PDF document text
    • https://jexumaravoza.weebly.com/uploads/1/3/4/2/134265375/217969.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/kigavanus/generador_eolico.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/surgical_apgar_score.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/persona_4_strength_persona.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_off00005e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2E 5356 bytes
SHA-256: 55ceb737dae95e2bf83dff92e4dfa5941ff3e34a4502ae763865cb5ef0852943
font_01_sfnt_off00007048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7048 10524 bytes
SHA-256: 07b40f1c4970206ac99bec0b4f4f365302fe2b05bf96618bcf5a5fabe4a34789