Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95d9bc9d4a070b7…

MALICIOUS

PDF

73.4 KB Created: 2021-01-13 15:45:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6b1f32311176ac9f3ddedb3857ac8738 SHA-1: 240e06bcdb6d45bd6147825a9caae5b55ce43887 SHA-256: b95d9bc9d4a070b75a8e8c9ea9c4d8fbf771cc94c9779d4ed7d0612fee74994f
154 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical alert for a PDF redirecting to known malicious infrastructure at 'traffmen.ru'. The ML classifier also strongly flagged this PDF. While no scripts were explicitly extracted, the presence of embedded URLs and the critical redirector link indicate a likely attempt to lead the user to a malicious site, potentially for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=panchatantra+short+stories+in+hindi In PDF document text
    • https://cdn.sqhk.co/wediximewoza/gcQghig/megan_is_missing_netflix_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459482/normal_5fe7acf7e523c.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/hcBijB2/70047802354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463809/normal_5fd2cde807d5c.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/7EgjfJN/alone_season_6_jordan_now.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f890a45e6001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415768/normal_5fb7f5ea0c470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f974bce8dc98.pdfIn PDF document text
    • https://cdn.sqhk.co/vivutazawi/ijhjjbg/real_drift_car_racing_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416790/normal_5fa538839a547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470977/normal_5fd9ab7a7d5bf.pdfIn PDF document text
    • https://cdn.sqhk.co/gotoruzud/GfghgiE/fekoz.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/moxekibupuru/stubhub_discount_code_march_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/miralurasujakatiru.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_off0000e388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE388 4996 bytes
SHA-256: 5761e187c5d35b9d6a13d401cfb0f0bd535cc8bebdc34dd6d8d9c14db5f60c87
font_01_sfnt_off0000f478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF478 10464 bytes
SHA-256: 8164e9e2c75536e6e16e2adae16fe2e5e67eb7e2f84cc645c7a28abb00741ab1

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