Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b1eac4e125e0c13…

MALICIOUS

PDF

62.2 KB Created: 2021-01-03 06:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 28520cb4a881de8a7a946f12e84760bc SHA-1: 5de3b4ca1ac430c0e53f60befa15eee57874fa78 SHA-256: 8b1eac4e125e0c13982d619bd60ad2f9e7635a99e33b09fa6ed5f8f5941756b3
154 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, specifically 'https://cctraff.ru/123?utm_term=process+systems+analysis+and+control+solution+manual'. The ML classifier also flagged this PDF with a high confidence score. While no scripts were extracted, the presence of a malicious redirector URL strongly suggests the document is designed to lure users to a harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=process+systems+analysis+and+control+solution+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_5f947579916b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457311/normal_5fa970cf0d0f6.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/neredimejegetus_zopovor_daxuponige_nimutatodexe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476582/normal_5fc7f7d685db5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375894/normal_5f89e48e199c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409257/normal_5fcd7c64998d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458827/normal_5fdcf11d3209c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5fad4c2be0cf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389387/normal_5f92b3b96f7f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384308/normal_5fc64e3517920.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454825/normal_5fc94d2678679.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/potofaw/95115737091.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_off0000b7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7FB 5188 bytes
SHA-256: f5d0b1c76cade07fb06834bebc1405fcba169584151d921ec7a34d37221f6c3e
font_01_sfnt_off0000c988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC988 10004 bytes
SHA-256: a9572cbfcea4c02b8eae9b03a2e6badbf8b901697173a0a812d7a8d4f13021fd

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