Malicious PDF — malware analysis report

Static analysis result for SHA-256 214cb0c4bbc5c633…

MALICIOUS

PDF

77.7 KB Created: 2020-12-27 21:22:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 389f9df26039a6479875277b9386c155 SHA-1: 121ff0d68d6601f697247a03b2cdf61c105fa858 SHA-256: 214cb0c4bbc5c633848821422cf24cbaa8b54d3c97d89c3c55eb4105cba604ff
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link pointing to 'ggtraff.ru', which is a known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firing indicate an attempt to lure the user to a compromised site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=epic+summoners+2+best+pet In PDF document text
    • https://cdn.sqhk.co/jekefebiba/TQ6V6bx/88251905068.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443356/normal_5fc82e092a815.pdfIn PDF document text
    • https://cdn.sqhk.co/kupulifip/hh8idjh/mirituforiwuxabowixujofo.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/3jeiijh/game_wallpaper_hd_for_smartphone.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/cgjyoAo/run_or_die_java_game_320x240.pdfIn PDF document text
    • https://cdn.sqhk.co/rowavarop/ejgjhYg/32872887634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385434/normal_5f971d05866e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496014/normal_5fd67bff275d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402297/normal_5f9f44d58239b.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/Twvgdhg/gotopirejasabatas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5fe6a4f69e28e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_5f92dbe1d85cc.pdfIn PDF document text
    • https://cdn.sqhk.co/pixisuja/gcjhjjA/disney_lip_art_designs.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/72514062-b7a7-4275-8395-86bc68878c6c/pijizifiku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2054cca5-adda-49e8-917f-8a5d755888a3/morirenor.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_off0000f45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45D 5064 bytes
SHA-256: 4931c8a902663f8041474189fe2f654f3d2ef45fe1c27f9939c45896b3bbc1d8
font_01_sfnt_off00010586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10586 10588 bytes
SHA-256: d17a52d793f3ddbe0e02d0427a1a086408af37858d5f2ba6ad0e28c20ed098c7

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