Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b93415d9b5dc13d…

MALICIOUS

PDF

73.2 KB Created: 2020-11-25 03:05:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fd8d47f1d57ba5f52137ca1f4356c84f SHA-1: ba9494ae1769f5b248f9c88140793cb2763ecaf0 SHA-256: 6b93415d9b5dc13d3b86d22b96124b91588748e4b85e526a1d7af9872016f594
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru', which is a strong indicator of a phishing or malware distribution attempt. The ML classifier also flagged the PDF with high confidence. Although no scripts were extracted, the presence of a malicious URL and the overall context suggest this document is designed to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/strik?utm_term=windows+xp+cracked+iso In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_5f9272e71ad17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449984/normal_5f9fc3e649387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383450/normal_5f8c8c8aa3207.pdfIn PDF document text
    • https://jumemovelavubar.weebly.com/uploads/1/3/4/5/134516611/2113277.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3602a8eb-6983-490f-9163-fe929598a161/71223424601.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/buy_rusted_metal_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3337df9e-055f-4e6c-8a0a-31f54db6a552/86733421360.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/orthographic_projection_drawing.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/bolafakovufosaz.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/kevijudafu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3D 5272 bytes
SHA-256: 7e67d3547b1239bbfd9229a69517438f0d19a40031279a03fda36c23bbb624cb
font_01_sfnt_off0000dd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD52 11196 bytes
SHA-256: 10cbef470f63edc66f12ca1c0fe6171163c4a083dc5475348b6ea213716b7c17
font_02_sfnt_off00010315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 16064 bytes
SHA-256: e475b127670123e0992d690554a82105660adb0ac795948380663d104441f777

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