Malicious PDF — malware analysis report

Static analysis result for SHA-256 854162a4992eda6d…

MALICIOUS

PDF

85.9 KB Created: 2020-08-10 07:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e12672675ed9cb376432ebcc5fbfc8b SHA-1: 33ad6ff0461c49558829be6d9c02c4426a8f1a69 SHA-256: 854162a4992eda6d4612505b5d4bb4ad22b244e13f16eafc3fe7ea4cc89065b5
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many pointing to Shopify domains, designed to create a link farm. One prominent link, 'https://ttraff.ru/pify?keyword=architectural+drawing+course+pdf', leads to a known malicious redirector. The document's structure and the presence of a malicious redirector suggest an attempt to distribute malware or phishing content through a deceptive lure.

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=architectural+drawing+course+pdf
    • http://sijivajej.valentinapetrova.org/uploads/1/3/1/6/131606289/julojixononawu_vevodib.pdf
    • http://files.lighthouseministriesworldwide.org/uploads/1/3/1/3/131379832/7514084.pdf
    • http://files.riseministry.org/uploads/1/3/1/1/131163734/303501.pdf
    • http://files.4energia.com/uploads/1/3/1/4/131453132/1575242.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9290/8962/files/regimento_interno_igreja_batista.pdf
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/windows_hosts_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/pazetepa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/jetajipizupisomupesuwewu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2767/files/zonoxojajo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2785/files/lexique_mecanique_anglais_francais.pdf
    • https://cdn.shopify.com/s/files/1/0429/1677/4054/files/xowisasipi.pdf
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/bucket_forks_harbor_freight.pdf
    • https://cdn.shopify.com/s/files/1/0434/8710/1094/files/71320171267.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/10029142477.pdf
    • https://cdn.shopify.com/s/files/1/0436/9563/6633/files/84816075118.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.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_off00010cfc.bin
d97fea49c6333e5bb7c7f0cc4be7f7f51011e1d00d728a515fe8a4e202e81c8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFC 5496 bytes
font_01_sfnt_off00011fbc.bin
267f2abf26e62fb4aca5ff1ac696c7af0594191c795f4eba47c7829e87830c34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBC 12876 bytes

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