Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fef1054b0ceb136…

MALICIOUS

PDF

50.4 KB Created: 2020-08-24 21:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86c75cd60136fb254a2e85d8985a8025 SHA-1: d04806bb9b2e441f77a424c83c0e1be0633e2cba SHA-256: 0fef1054b0ceb136e901c65fe1324c37636b4a496f7d0c273699c924c4361eb3
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm or SEO manipulation tactic. One of the primary links, https://ttraff.ru/pify?keyword=odia+new+dj+song++site, is flagged as a malicious redirector, suggesting the document's purpose is to lead users to malicious infrastructure. 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.ru/pify?keyword=odia+new+dj+song++site
    • http://luketak.scienceclassroom.com/uploads/1/3/0/7/130738854/7147632.pdf
    • http://files.lindsayvickery.com/uploads/1/3/2/6/132695575/venazizonilaxa_podugutirokewe_pidomitazil_dekasepez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/vafadorusaxinevizodaxij.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8342/files/plane_finder_flight_tracker_apk_pro.pdf
    • https://cdn.shopify.com/s/files/1/0431/8412/8151/files/pesemasovowevib.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7491/files/79397140308.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4328/files/42678935801.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/lewis_dot_diagrams_worksheet_answers_instructional_fair.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4741/files/36853211515.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/19548998258.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/jinufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/97796999358.pdf
    • https://cdn.shopify.com/s/files/1/0447/2678/0060/files/shark_dichotomous_key_analysis_questions_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99237037604.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_off00007b1a.bin
2d2b607e7d3fde9962ae28fd2bcaad7535603d1272e83e177709a3e1cb004030
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1A 5060 bytes
font_01_sfnt_off00008c80.bin
d397f90222e370a3f67bd9473f26b5532e51ac4d3e06f8f9cb6a1a22ac8a991c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C80 15220 bytes