Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c811c9db9e55cae…

MALICIOUS

PDF

63.7 KB Created: 2020-11-19 16:15:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cd34ec5b91a0a07af063f6ea74d83b3 SHA-1: d77e7313f439115da2c68ec8e6d5ba45cad539e1 SHA-256: 6c811c9db9e55caea8247c2ff02506a445b849a8f4972dd565d1867697e1aac0
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The embedded URL, https://traffmen.ru/123?utm_term=busted+mugshots+toledo+ohio, is the primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution. No scripts were extracted, but the PDF structure and URL strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=busted+mugshots+toledo+ohio
    • https://cdn-cms.f-static.net/uploads/4386606/normal_5fb262e99876c.pdf
    • https://lexebemo.weebly.com/uploads/1/3/4/3/134315688/ratuxapop-diwafubatudip-bidalifag.pdf
    • https://xizerusepu.weebly.com/uploads/1/3/4/3/134308384/telimo_jelozofo_degasodu_poxatamag.pdf
    • https://cdn-cms.f-static.net/uploads/4369190/normal_5fac52e96dfbe.pdf
    • https://nuvuxupu.weebly.com/uploads/1/3/4/5/134507381/1002614.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c620f2b0-443d-4c39-bded-d65ed9880ace/zakuvogopopabujuf.pdf
    • https://uploads.strikinglycdn.com/files/26b15041-4064-4e0a-8581-1091ad4abe01/boys_in_the_boat_study_guide.pdf
    • https://s3.amazonaws.com/senodiw/64003423142.pdf
    • https://s3.amazonaws.com/tobobowu/bernoulli_equation_experiment.pdf
    • https://s3.amazonaws.com/xefejevife/red_microwave_900w.pdf
    • https://s3.amazonaws.com/kufazete/la_casa_en_mango_street.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf3a.bin
91be5e52733c3df1ad6387d4aa2163a80be4639366bff41173a5b4c33f069aa6
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF3A 4984 bytes
font_01_sfnt_off0000d00a.bin
7c38e1fe3b71e7174328342f228019dadeb819d310a92b5ef3534000394b8aea
pdf-font-stream PDF embedded font (sfnt) at offset 0xD00A 10048 bytes