Malicious PDF — malware analysis report

Static analysis result for SHA-256 b429e5d3e1ac5eac…

MALICIOUS

PDF

66.9 KB Created: 2020-12-14 17:34:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3c7046cb2c1ee505ce26393b2f2cfeb3 SHA-1: 767537bf8163c4244fb5d46fda33983dfe0b495e SHA-256: b429e5d3e1ac5eac65f576108494df58bf403507a5bd93bda5d0edb3c5fd9bc7
154 Risk Score

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 'https://traffking.ru/123'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. While no scripts were explicitly extracted, the presence of a malicious URL and the ML classifier's high confidence score strongly suggest a phishing or malware distribution attempt.

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://traffking.ru/123?utm_term=number+of+red+face+cards+in+a+deck+of+playing+cards In PDF document text
    • https://cdn-cms.f-static.net/uploads/4457305/normal_5fae7cd9280dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_5f8f64998f7ed.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/saxefi/us_today_s_news.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/okuma_guide_select_salmon_rods.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/23797684433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/266c81d6-9699-43a4-8c26-6b401152a365/mefobigibulifibozid.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/salikoninepet.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/assam_university_result_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/international_acid_rain_information_centre_wikipedia.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/mexuxabugeloxanodedapefe.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_off0000c64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64C 5748 bytes
SHA-256: 0e11a278453d167d4e52b6c42d927d1400778959e3fd7ccd1ab84cf42983fce2
font_01_sfnt_off0000d9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D3 10700 bytes
SHA-256: 96ca6174ca0bc94c3a36f48731d27c3557e996f96b119dad23ec3043b2005f77

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