Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1ce5c09b024fda…

MALICIOUS

PDF

63.7 KB Created: 2020-11-18 11:30:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 161699ac190bb86cb04958a3222fde50 SHA-1: 22d8950054fbbc56ef792395d25e5bc40b8d3c73 SHA-256: 9f1ce5c09b024fda9d585d88a1f5354567c60180525e3c8ac439535766d5fa43
154 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically `https://cctraff.ru/strik?utm_term=proform+elliptical+instruction+manual`. Heuristics indicate this is a malicious redirector and a phishing attempt. The document body, though heavily obfuscated, suggests it is masquerading as an instruction manual to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=proform+elliptical+instruction+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f893101e344c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377925/normal_5f8ca4d627c91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496374/normal_5fad7c19a6d2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f87110c0cb73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402501/normal_5f9b9fbb27e9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417531/normal_5fab5f57177e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5f9c8f8ab4316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f874ebc3e357.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/jedobufudajewu/5511816403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf3aa97d-ce3c-4ecd-9d00-b1bd24533b61/summertime_saga_download_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ecbfaf9-b917-4754-828e-2293e26ce476/xuxenarezuvot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2458e74-c0da-40cf-9280-e16c256ff7fa/tubiduri.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/56380847163.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_off0000bbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB0 5164 bytes
SHA-256: 43626ddeecae8b13cac335a6f460ce33b9caf37b9031631c571b47cb1233dae1
font_01_sfnt_off0000cd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD24 11000 bytes
SHA-256: 71b91126c415aa0f0bfb035a4aa1efd920522fcf32f4403d31b57c9375696dac

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