Malicious PDF — malware analysis report

Static analysis result for SHA-256 36b20f9d62bcd962…

MALICIOUS

PDF

67.5 KB Created: 2020-11-23 06:20:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: eb4c86b413911741015c668a3b1913c1 SHA-1: 517ad6b12feaef30164e327fbac098835fc33720 SHA-256: 36b20f9d62bcd962b6bb2a6938381de3f0120e9076722c3483ca708783b3d6fb
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://gettraff.ru/aws?utm_term=shape+brush+photoshop+free'. ML classification also strongly indicates maliciousness. While no scripts were extracted, the presence of a malicious URL suggests the document's primary purpose is to lure the user to a compromised site, fitting the pattern of a phishing or malware delivery attempt.

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://gettraff.ru/aws?utm_term=shape+brush+photoshop+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_5f924d616d7f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377697/normal_5f8a04e92338e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384144/normal_5f8d81a65311d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461505/normal_5faf8773d5383.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385633/normal_5f9226dd4a1a6.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/jozetej/download_geometry_dash_full_apk_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/134d6d56-1145-47e2-8737-b75c871ad15b/how_to_draw_kingdom_hearts_3_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/timafatafej/ccna_chapter_9_exam_answer_2018_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/monthly_calendar_template_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/hdfc_bank_ltd_rtgs_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa382f72-b55e-4c68-ae80-f95686f82e5c/bella_slow_cooker_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/comparison_of_adjectives_worksheets_for_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/sagibujesilu.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/53262558490.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_off0000cb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB52 5200 bytes
SHA-256: a935c9ce61520852cf7fc6c968dcb127af6e4109ff57758c3d51b484072e3e42
font_01_sfnt_off0000dcf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF5 10656 bytes
SHA-256: 0e5e5902c639c3989112931466a8ae5c52d68497c06d7e583f1f482b19dafed6

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