Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ebe3ce01314e66…

MALICIOUS

PDF

48.4 KB Created: 2020-08-31 15:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1158176a8943712df235fd70595b4b78 SHA-1: 4c6ea8490fb100414f7e1baa4845128afdb8b866 SHA-256: 68ebe3ce01314e668bb73b35990d099085ca406688346d5f7d3e51e2afa9adb7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, includes the same malicious URL, suggesting an attempt to direct users to potentially harmful content. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic.

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/wix?keyword=piriformis+syndrome+causing+sciatica
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0837/6482/files/html_css_templates_for_practice.pdf
    • https://cdn.shopify.com/s/files/1/0437/5589/6990/files/duvifokoruvapexagaxibugop.pdf
    • https://cdn.shopify.com/s/files/1/0436/4930/2693/files/fozobiminowor.pdf
    • https://cdn.shopify.com/s/files/1/0434/5819/9719/files/10172231962.pdf
    • https://cdn.shopify.com/s/files/1/0433/4111/9647/files/que_es_robotica_educativa.pdf
    • https://static.usrfiles.com/ugd/865d50_69df5ec22ac34befbaa4357e27597d4d.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_3127b8aa5be14c809bf70f696c43d3c9.pdf
    • https://static.usrfiles.com/ugd/34ec99_e80a27cc96ac4aa08dd01ddd5fb88ee4.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/irs_form_4952.pdf
    • https://cdn.shopify.com/s/files/1/0435/9048/4131/files/jejosawejexunavegoteb.pdf
    • https://cdn.shopify.com/s/files/1/0435/2173/6859/files/vidaferaporiluz.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_off00007f7f.bin
4ebd0b6aa8ecfc4529f4e57f064c01d5661c00083623b5fae9fac355fd805818
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7F 5412 bytes
font_01_sfnt_off000091dc.bin
f477d617a0cf21dac36f2ca38d329b88dd627372b1ced75f96f284f4538321c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x91DC 10376 bytes