Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d19a4f5ae0f4455…

MALICIOUS

PDF

41.9 KB Created: 2020-08-19 06:38:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e38b8c3f5178835e7e71e321689b8cf SHA-1: dfc09fbae251b93c6b4b0031d00941d6e7abb6af SHA-256: 5d19a4f5ae0f4455d490870cce2245b8afa5400e8edfc83dee77c31e22078450
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a material safety data sheet. It also exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to redirect users to harmful content.

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=material+safety+data+sheet+ethanoic+acid
    • http://sonimiw.visitsolonsprings.com/uploads/1/3/1/4/131452903/5b95211f544.pdf
    • http://ralaxu.jropro.com/uploads/1/3/1/4/131454521/badeburapurave.pdf
    • http://files.leannajaneyoga.com/uploads/1/3/0/7/130738875/bedavup.pdf
    • http://buvaluv.triyourlimits.com/uploads/1/3/1/4/131406717/kelivurivixoti-ditolek-pirezusasorif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5430/0312/files/coffee_roasting_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/8994/3971/files/47884215671.pdf
    • https://cdn.shopify.com/s/files/1/0432/6821/0852/files/xeweposifigasamawukigeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/globo_play_globo_reporter_ontem.pdf
    • https://cdn.shopify.com/s/files/1/0437/3292/6616/files/jevidoliradezowina.pdf
    • https://cdn.shopify.com/s/files/1/0432/0021/7249/files/francoise_sagan_bonjour_tristesse.pdf
    • https://cdn.shopify.com/s/files/1/0430/9988/1639/files/wewavez.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/rabudagajesub.pdf
    • https://cdn.shopify.com/s/files/1/0434/1009/6284/files/milady_barber_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/4504/3876/files/keirsey_bates_temperament_sorter.pdf
    • https://cdn.shopify.com/s/files/1/0452/2462/4288/files/buvunemitoninexejetib.pdf
    • https://cdn.shopify.com/s/files/1/0437/1018/5621/files/bixirigejune.pdf
    • https://cdn.shopify.com/s/files/1/0434/4951/6199/files/iskender_pala_su_kasidesi.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_off0000654f.bin
3656f580a82d422897a79e1e54970686483ce2c62a4c0e24022db57c88446989		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654F 5216 bytes
font_01_sfnt_off0000770d.bin
54c2735b7ade5907b7515722ff0fe91db8d5755240c75913bfe15caa06924664		 pdf-font-stream PDF embedded font (sfnt) at offset 0x770D 10412 bytes

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