Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4e82f762a225fd…

MALICIOUS

PDF

70.0 KB Created: 2020-11-26 06:20:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: aabb9505bc090510f66aba71c8a6d127 SHA-1: ef8cab54e9a168ab03bdd39ce2f55927bcb592f6 SHA-256: ea4e82f762a225fd3b1f691e0d22e046042d8b478cbab9d8cc94c84eee09cf3b
214 Risk Score

Malware Insights

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

The PDF contains embedded links, with one critical heuristic identifying it as a malicious redirector pointing to 'https://cctraff.ru/strik?utm_term=why+does+directv+say+select+a+server'. Another heuristic indicates a PDF link farm, suggesting a broader campaign. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=why+does+directv+say+select+a+server In PDF document text
    • https://cdn-cms.f-static.net/uploads/4445125/normal_5fb923a17cd4c.pdfIn PDF document text
    • https://viserewisesu.weebly.com/uploads/1/3/4/8/134886384/dabodibewat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5f9ece92ec33e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424991/normal_5fada6966b62a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421781/normal_5f975740d9a8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452588/normal_5fa407b7be13d.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/jinabisura/14604709296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74cf6323-a0fd-4c3b-8dfe-99bf57d2866f/rudefebozogeme.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/58576361440.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/97608161355.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/lowisapimalug.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_off0000d4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D3 5200 bytes
SHA-256: 0587234efe0dc6e8c950b4f389bfe818991529b57ddc69aaefb899216fcae86b
font_01_sfnt_off0000e697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE697 10748 bytes
SHA-256: 431962fab5d0c2fcb0a8d829b3e747449a5f7fccde81bd385fff85f8807e390e

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