Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d83365fc027c4e0…

MALICIOUS

PDF

42.9 KB Created: 2020-11-02 15:46:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d90dd30b19281eb8b042003aed6e6a07 SHA-1: 894688ad0e9304ed5d55cb8089767c00c9571513 SHA-256: 3d83365fc027c4e0150ffebcb0ec77193817a3f707bf4e8a7183b996f78547b0
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 critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://ggtraff.ru/strik?keyword=yahoo+mapquest+directions+driving+directions, is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector URL is sufficient to classify this as a phishing or malware distribution attempt.

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/strik?keyword=yahoo+mapquest+directions+driving+directions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5f90a627b6483.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/9755694.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f954b19a7e54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391015/normal_5f9488b4028f2.pdfIn PDF document text
    • https://dawiganolakegoz.weebly.com/uploads/1/3/4/3/134367714/9471253.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/wizokulapigitub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f9245391e9af.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xizaxamuxive.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/kijelopazekune/masojel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7728/7070/files/39109061247.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/metabolismo_de_proteinas_en_vacas_lecheras.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/epanet_manual_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8729/6680/files/vexamemafetuforu.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/tiny_dancer_elton_john_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/stretches_for_runner_s_knee.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_off000066fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66FC 5600 bytes
SHA-256: 32c35ec922e84b62d822662ec339345d4fa85e3ef6d03e33e5b25bcade20fbbe
font_01_sfnt_off000079e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79E0 10956 bytes
SHA-256: 7565548097db6cb99b804d31b7ad2c06e64b1a0728b237346cde2c6515a3b4f4

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