Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e20ce989fa9036…

MALICIOUS

PDF

70.0 KB Created: 2021-01-29 04:09:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9dcadaf837e3399456219f63a0af278f SHA-1: 9b18bd20e53609038a363cfa4920fe63baf7f8be SHA-256: c1e20ce989fa903662af0fe172d63a62f9e8b7e9a6cb2fd889a81b5b38cc8bf7
162 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/wb?keyword=h.%20264%20dvr%20firmware%20upgrade%20tool%20download'. This, combined with ML classification and ClamAV detection, strongly indicates malicious intent. The presence of a 'download button' heuristic further supports a lure-based attack pattern. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://gettraff.ru/wb?keyword=h.%20264%20dvr%20firmware%20upgrade%20tool%20download In PDF document text
    • https://cdn.sqhk.co/navuwamas/cPQihbM/motorcycle_traffic_rider_hack_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/ghjjh1G/xovakulolezegatimi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496391/normal_5fe550f924e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_5fd1724e59df8.pdfIn PDF document text
    • http://rezltml.xyz/acknowledgement_for_project_report_pl2d8a.pdfIn PDF document text
    • https://cdn.sqhk.co/pininipata/jhcvifn/historical_thinking_skills_examples.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/nalifij/riven_guide_warframe.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/31624547810.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/cartoon_series_online.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_off0000c53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC53D 5584 bytes
SHA-256: 57b2c88df500ffa47f6ff0661aeccde224f347a2e401ddad57cf1d4c2cfaf6a0
font_01_sfnt_off0000d83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83C 10860 bytes
SHA-256: 7a64d5481fdf873ed0912bf77751d577bac78394b1be7956d61178f536f5b94b
font_02_sfnt_off0000fd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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