Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e45608cdf939b7…

MALICIOUS

PDF

77.4 KB Created: 2021-01-16 20:55:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 642dc557d37ac269206903ccba745130 SHA-1: 9e62916316182d77bab2ce5b5cd66bad8b7ad373 SHA-256: e9e45608cdf939b7c312cc70f228342c6df19406c858dccbdf5b5fc58fdac7ea
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 'ggtraff.ru'. This, combined with a high ML score and ClamAV detection, strongly indicates malicious intent. The document body, though heavily obfuscated, appears to contain metadata related to the wkhtmltopdf tool, suggesting it might be a generated document used to host the malicious link.

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://ggtraff.ru/123?utm_term=ecchi+anime+like+how+not+to+summon+a+demon+lord In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410004/normal_5f93860c2d17d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393635/normal_5f9faa746789d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444100/normal_5fa853ac0a031.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373997/normal_5ffe66892b1e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393925/normal_5fd63334db7da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451575/normal_5febd3300e832.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471091/normal_5fbd1faf9436a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453900/normal_5fad2a1aba9c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444630/normal_5fe6453b59188.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478952/normal_5ff1dcbdb98c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tisegovofu/59632099695.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/83717191871.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4ED 5172 bytes
SHA-256: 54957e7779a3f4e9461c33d59822c7c4caa58632d7ff3c57f73d80ee147aae5b
font_01_sfnt_off0000f659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF659 10580 bytes
SHA-256: 397b4e8fc7d0fb8a015291c634a3cd560e8aab6541da2d778db3c377c98ceb45
font_02_sfnt_off00011a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9B 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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