Malicious PDF — malware analysis report

Static analysis result for SHA-256 4846b3b2105d534a…

MALICIOUS

PDF

74.3 KB Created: 2021-01-11 10:04:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b767372949a59fac6745e842a7d09fa SHA-1: d4c979f1b682a1e401f2910715c61ad2c3b0435b SHA-256: 4846b3b2105d534a66896f14abb5ae3ae8b84bacf39a76935837ccbeee9035cc
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 'ggtraff.ru', which is also listed as an embedded URL. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The document body, though truncated, suggests a lure related to software cracks, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=wondershare+mirrorgo+crack+2018
    • https://site-1177918.mozfiles.com/files/1177918/38359794939.pdf
    • https://static.s123-cdn-static.com/uploads/4494673/normal_5ff355dcef454.pdf
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f878912c0022.pdf
    • https://cdn.sqhk.co/vufisolepu/a6jeijV/jovububabipiseru.pdf
    • https://cdn.sqhk.co/bagudivibi/R5LdBgX/bikovu.pdf
    • https://cdn.sqhk.co/tigixexaxi/pDjjhab/airport_city_codes_usa.pdf
    • https://static.s123-cdn-static.com/uploads/4405904/normal_5fe418a8bfc28.pdf
    • https://cdn.sqhk.co/kegufamop/boujgjc/flight_simulator_2018_flywings_apk_download.pdf
    • https://cdn-cms.f-static.net/uploads/4501042/normal_5fbd7fcd55564.pdf
    • https://cdn.sqhk.co/gumakulex/dZ2yzja/5865108235.pdf
    • https://cdn-cms.f-static.net/uploads/4410190/normal_5f98559629c99.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kukupunopedon/who_breastfeeding_guidelines_2015.pdf
    • https://s3.amazonaws.com/tiduro/liberty_township_butler_county_ohio_news.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc12.bin
527a061f057d2dbebc10bcc983ba73b3eff4bf035d76b62c14ffc1e26e032c01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC12 5916 bytes
font_01_sfnt_off0000e01f.bin
47ecc37f760ece051cf6f9339f536db2a12110cd2029b6cab3874dc88a7df856		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE01F 11424 bytes
font_02_sfnt_off00010637.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10637 16312 bytes

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