Malicious PDF — malware analysis report

Static analysis result for SHA-256 c92d7859dea2df98…

MALICIOUS

PDF

39.4 KB Created: 2020-11-02 17:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f105437333833210ffdbd891f4f057e4 SHA-1: 1e5ec532e29d19459ffcd49832e916dfb0bfacf3 SHA-256: c92d7859dea2df98fe06d7fddeaad9ea4f77498708aa78ee120d934cce9fbc5d
94 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'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs and the redirector link indicate an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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?keyword=download+real+racing+3+apk+%252B+mod In PDF document text
    • https://fevapeju.weebly.com/uploads/1/3/4/4/134468187/sobutibiporut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_5f95e1a8b2fa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f99f41eef356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_5f9342a41a4c2.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/taruzudov/8th_grade_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7582/2278/files/90781485743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4093/7896/files/ver_contrasea_wifi_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8276/0601/files/nomenclature_polyatomic_ions_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23e58b06-851f-4382-9097-cb4496d936c9/timuwuzojusewuxikalefez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/botusofawuxut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8871/8240/files/manual_logic_pro_9_portugues.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_off00005796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5796 5532 bytes
SHA-256: e215785a1834007ed7b7681f389c5b631ec8ce8c588efd2a3c56eb249455ec64
font_01_sfnt_off00006a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A76 11352 bytes
SHA-256: bd13050bb967105ba424de1f11bf595fceda7a7fe3dce81bbfc01c31580a28a6