Malicious PDF — malware analysis report

Static analysis result for SHA-256 3177d9520819cfe1…

MALICIOUS

PDF

57.0 KB Created: 2020-11-03 05:45:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efd3d5fc9d98ae5ec56b4d692ffa08d5 SHA-1: 17de664a2a1c73717e7ebaaca5e4d5e1dd6b9144 SHA-256: 3177d9520819cfe132de2c52d8933e18652acaba47a6905eea2d792bf00890d0
94 Risk Score

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=orthodontic+supply+company+ose, 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 suggests a phishing or malware delivery 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=orthodontic+supply+company+ose
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wonoti/leech_maxims_of_politeness.pdf
    • https://uploads.strikinglycdn.com/files/ad96eb4c-f95a-43c1-8ef0-623bd6ef7572/30323998628.pdf
    • https://s3.amazonaws.com/pugomonapoxuxe/45378202610.pdf
    • https://s3.amazonaws.com/wonoti/psychology_notes_in_urdu.pdf
    • https://s3.amazonaws.com/wofaxil/introductory_mathematical_analysis_fourteenth_edition.pdf
    • https://s3.amazonaws.com/teximikamukubo/65821667532.pdf
    • https://uploads.strikinglycdn.com/files/5bf044bb-9a5f-4ad5-8b54-98634b972248/pijibopubekokifiju.pdf
    • https://s3.amazonaws.com/napoledunadigo/set_notation_worksheet.pdf
    • https://s3.amazonaws.com/remuv/the_handbook_epictetus.pdf
    • https://uploads.strikinglycdn.com/files/7826ad92-e8a9-4fb8-b123-d070af54d969/gajubiz.pdf
    • https://cdn.shopify.com/s/files/1/0481/5755/6903/files/dent_1.0.5_apk_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/7289/4629/files/tubuzozov.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000097a4.bin
8cd92df8834cef083cd53e3d2413942d518aba34930093535352e7b65d1a3fb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97A4 5444 bytes
font_01_sfnt_off0000a9f4.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9F4 1800 bytes
font_02_sfnt_off0000b281.bin
474863cd888ce57284fcdb0dea6cc5d05f1171832d85e630419438ce12c5bc92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB281 10720 bytes

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