Malicious PDF — malware analysis report

Static analysis result for SHA-256 199a09df0d97e39d…

MALICIOUS

PDF

38.6 KB Created: 2020-08-22 13:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7ddbed1e19026dcec5ba3c13b0b2315 SHA-1: 1e2275ba800ab8efde74ce7ab05ca21627abbfd1 SHA-256: 199a09df0d97e39de2c8c0031e2e613a971f442a4d479085b0f5fc48ad8b9243
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. This indicates a likely attempt to manipulate search engine results or distribute malicious content through a link farm. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=rupinder+gandhi+the+gangster+photos
    • http://jedapunab.rangerscowboysspursandhorns.com/uploads/1/3/0/7/130739090/bofozakirugiju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4857/4884/files/luroredebizugovobovorolur.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/fewofezevatad.pdf
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/97540062572.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/28585126917.pdf
    • https://cdn.shopify.com/s/files/1/0431/3825/2954/files/os_argonautas_do_pacfico_ocidental.pdf
    • https://cdn.shopify.com/s/files/1/0431/5358/8390/files/tonepewabawikivetevunex.pdf
    • https://cdn.shopify.com/s/files/1/0431/9952/9121/files/arduino_uno_starter_kit_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/3119/7856/files/certification_afnor_centre_de_formation.pdf
    • https://cdn.shopify.com/s/files/1/0435/6423/6968/files/deezloader_remix_4._3._0_gratis.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_off000059c7.bin
4bdbc5cd8656ef4669279742dcddcd3823d40ccc98ce9b251ac8be2755614ebf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59C7 5196 bytes
font_01_sfnt_off00006b62.bin
7915e4b5ef321671aebbd85eb3776515f9384ec73cffe7ab26e5878a0a477844		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B62 10136 bytes

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