Malicious PDF — malware analysis report

Static analysis result for SHA-256 02fe390b8efb7b28…

MALICIOUS

PDF

46.6 KB Created: 2020-08-19 23:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a1b4c3441e54021cc15db30d4ad4182 SHA-1: 82c1085be2762c3bd11ffc10583e30208fcf88c4 SHA-256: 02fe390b8efb7b2841dd44236e712a86aaffd6cf96be60eb7b9fd0e31593f02f
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ttraff.ru/pify?keyword=project+reference+list+template'. This indicates an attempt to redirect users to malicious infrastructure, likely for phishing or malware distribution. 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 infer a phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=project+reference+list+template
    • http://files.fnaq.org/uploads/1/3/0/9/130969944/nivubuluro.pdf
    • http://files.uscontherhine.com/uploads/1/3/0/8/130873930/3481d.pdf
    • http://nakize.magicfitnessforyou.com/uploads/1/3/1/6/131637881/rexunisol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4542/8122/files/5775567076.pdf
    • https://cdn.shopify.com/s/files/1/0428/1915/8183/files/fenalodibuduponodovup.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5549/files/ms_excel_assignments_for_practice.pdf
    • https://cdn.shopify.com/s/files/1/0439/4038/0840/files/60456099111.pdf
    • https://cdn.shopify.com/s/files/1/0440/1171/6766/files/tozepewurifo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3834/3322/files/nubogom.pdf
    • https://cdn.shopify.com/s/files/1/0430/8051/5745/files/pivev.pdf
    • https://cdn.shopify.com/s/files/1/0438/9978/1275/files/78776949459.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/wupopulubipegolitemozunas.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/53586418092.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/armory_3d_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/6172/2788/files/observations_based_on_sensory_integration_theory.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_off000079b1.bin
913dce83410e4b5c41ea6521a4e349e425396f4190c530b704d8b9d129b94385		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B1 5236 bytes
font_01_sfnt_off00008b68.bin
99fe78556ea771850bcc8b5c27e29fa8c4b3c259f92845a1efa78e591feeadc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B68 9936 bytes

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