Malicious PDF — malware analysis report

Static analysis result for SHA-256 407bc533f15cd6a7…

MALICIOUS

PDF

74.7 KB Created: 2020-11-24 13:57:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ece373bb753cfbeb0e07ad56052acf06 SHA-1: c267203a00297e1aaeac66c364f70c8fbd0b28a4 SHA-256: 407bc533f15cd6a7569113fb065d20af2a9fc88647ec55333e1bc059d9ca8b8e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing/malware distribution intent.

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://traffmen.ru/strik?utm_term=the+three+estates+in+pre-revolutionary+france In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_5fbbf8c42e99c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471683/normal_5fb8ecda3a9d8.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/bupijila/92946674304.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/laxufejotirurowot.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/68829963885.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/39122074804.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/nugot.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/40812494400.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/momentum_impulse_and_momentum_change_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/91967594045.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/79610333270.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/wind_turbine_lab_report_osu.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_off0000e766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE766 5244 bytes
SHA-256: fea9cc72b655ccf52d7caa5cdd833ec558f8e1bf813c703b65c5de6c7edeb4cf
font_01_sfnt_off0000f94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94E 10936 bytes
SHA-256: f3b09445d120295e70e1a6363e5662c90c669953b8e03145ca9518e319ef4198

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