Malicious PDF — malware analysis report

Static analysis result for SHA-256 da74de7d9556b2d3…

MALICIOUS

PDF

67.8 KB Created: 2021-01-07 04:20:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 64f7c152ff32953a7fc421be46554024 SHA-1: 5e9997a74079ca6455fe5b0dcd0621949a2dc49c SHA-256: da74de7d9556b2d313b4448d96b6ff5a3460dc68774b5dacf50c70589afdf7b7
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link to 'traffine.ru'. This URL is likely used to lure users to a phishing site or download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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://traffine.ru/123?utm_term=popular+italian+boy+names+1950 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4393628/normal_5fc9dc4a15773.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424330/normal_5fd26c9f84a89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476135/normal_5fb8f714f380c.pdfIn PDF document text
    • https://cdn.sqhk.co/dobopejig/hgphboV/77114362382.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/jiiGhjD/parallel_worlds_michio_kaku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465908/normal_5fdfffbdd2c90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464996/normal_5fd7cfa644629.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/jalasilunaz/elasticsearch_architecture_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/690490ad-b791-4126-b0ef-61a1e5e3380e/16197779134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3b3a772-2e80-4177-b009-cb830d1197a7/99084907276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a1d192e-d635-4478-9f7c-c001805a4a8a/51813894525.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/gufebupogomaziw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fcc45fa-9306-4356-8af8-971a45516325/5068302278.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/tijepesexefasavogidog.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_off0000cc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7C 5684 bytes
SHA-256: 58cd38f8d931531371ab218f08634c5f3a7f139b0b6b75dd7b5bbaef355970c8
font_01_sfnt_off0000dfc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC0 10364 bytes
SHA-256: 45a2f8130e80deae400f9055795c89e8440195a28b22b8580ae13ad4c85203a0

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