Malicious PDF — malware analysis report

Static analysis result for SHA-256 1609c005b0e98285…

MALICIOUS

PDF

37.0 KB Created: 2020-08-18 15:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b913f43ae088b6b42af05b2a5ded5893 SHA-1: 15c77e0fab301790fa68207d89dda0e8a4e970b3 SHA-256: 1609c005b0e98285bd5fdae969072865ffec97eb6eb502a7092a74fcec6d3eb4
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.ru). While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, potentially for phishing or malware distribution.

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=poovarasan+kattikidalam+video+song
    • http://files.vinegardenmarket.com/uploads/1/3/1/4/131483097/nopukokone-nofotine-sutozamiponaju-bejepewasibo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/export_as_illustrator.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43181801848.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/warhammer_40k_8th_edition_faq.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7670/files/consolidated_report_meaning_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/topajujerabakivabidaxidix.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/13557630468.pdf
    • https://cdn.shopify.com/s/files/1/0435/6312/2843/files/xumigonedavukesibif.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/bisiguxutevoke.pdf
    • https://cdn.shopify.com/s/files/1/0434/4043/9446/files/23019531268.pdf
    • https://cdn.shopify.com/s/files/1/0433/1307/0238/files/93965255444.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_off00004b15.bin
c39e083b31779dae0ee6b7d0bb5c2b7ff9b700790c48e2675cf875620f3dda33
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B15 5268 bytes
font_01_sfnt_off00005cef.bin
992306f7328cec8b0ff8e148548ec86de924c193c07e9caee63689f6feb74aa4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CEF 13976 bytes