Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd46af60da9ef329…

MALICIOUS

PDF

69.1 KB Created: 2020-11-18 12:58:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c4ff78a27a2964a663bca6ecf0d8261d SHA-1: 7548946a33d228fc85983eb9618da3953dbc4a81 SHA-256: cd46af60da9ef3295615880a09a2b7f23558fd4fe1f23f86334a179d40b659b4
154 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://ggtraff.ru/aws?utm_term=pneumonia+guidelines+2017+pediatrics'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. The document body, though heavily obfuscated, appears to be a lure related to medical guidelines, suggesting a phishing or social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=pneumonia+guidelines+2017+pediatrics In PDF document text
    • https://cdn-cms.f-static.net/uploads/4469837/normal_5fb2f1f850c75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5f99b507c786c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475571/normal_5faa5aa343d50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f8b0f5e3219c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446272/normal_5fa64479b311b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384632/normal_5fa86f70d07e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422645/normal_5f983e5e0d5cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5fab30f33e0fa.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/wixanarer/juvakukiribepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a820be85-04a4-44f3-9539-c3961ec99a93/wolf_fang_talisman_pathfinder_2e.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/gb_instagram_apk_free_download_latest_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21463513-642c-4991-9d0d-9d81ad06d8f6/earth_s_best_diapers_review.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/wiwigoti.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/fit_for_life_harvey_diamond.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_off0000d0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B3 5800 bytes
SHA-256: d85d339b820ef099996884622177f77a603d7877fe35186e210183617380c012
font_01_sfnt_off0000e46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46A 10196 bytes
SHA-256: f20b384160e2bada6a9bbd3f7a1e1dde7ece9258c0c0dee91c6a03b43642b19d

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