Malicious PDF — malware analysis report

Static analysis result for SHA-256 75bbe85150ee8088…

MALICIOUS

PDF

41.4 KB Created: 2020-08-27 22:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b920436b8746ee68c725545454158d38 SHA-1: 3059b317147e2b5cb4534c31b18fa2af8edbbb53 SHA-256: 75bbe85150ee8088c35ee49a4bf448fd491b71bd463a316d06254cebe06d7fc6
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://ttraff.ru/pify?keyword=healthcare+domain+knowledge+pdf+down' is the primary indicator of this malicious redirection attempt. While no scripts were explicitly extracted, the nature of PDF redirects often involves embedded JavaScript to facilitate the redirection.

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://ttraff.ru/pify?keyword=healthcare+domain+knowledge+pdf+down
    • http://nusunog.rozannaartist.co.uk/uploads/1/3/0/8/130814328/rowel.pdf
    • http://files.towtruckvictoria.com/uploads/1/3/1/4/131410545/kizuxa-lilivej-ninuv-vurawewevov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3558/8770/files/mechanics_of_materials_6th_edition_solution.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/mofifajes.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1957/files/attitudes_to_language_reading.pdf
    • https://cdn.shopify.com/s/files/1/0462/9358/1985/files/vuzejelofe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5464/files/camera_scanner_vers_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/12810595486.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/26877154689.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000642d.bin
7b1ecbacfd7f84f9e1519660cd9b0194eb1ded3d0bdbd1b6a61650d8ef8c0346		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642D 5508 bytes
font_01_sfnt_off000076d7.bin
765d69f689895f965eeab6139250e88b01dbd31914b58ac547adc0a1189e4db7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D7 10044 bytes

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