Malicious PDF — malware analysis report

Static analysis result for SHA-256 5deaa567b81249fe…

MALICIOUS

PDF

49.9 KB Created: 2020-08-06 19:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccd50da16355ad529feca3d416b0b39e SHA-1: 6cb04ac0ef924600f946df48e20ffc1b15ef45d4 SHA-256: 5deaa567b81249fe63880e96652e494af93c9bb365caeb0f6148049c785d4bef
154 Risk Score

Malware Insights

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

This PDF document contains a link designed to appear as a legitimate resource for constitutional amendments, but it redirects to malicious infrastructure. The document also hosts a large number of external PDF links, many of which are hosted on Shopify, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the presence of malicious redirector links and the link farm indicate a phishing or malicious redirection attempt.

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=important+constitutional+amendments+upsc+pdf
    • http://files.slehschoirs.com/uploads/1/3/0/8/130813558/dozuxota-notorimiti.pdf
    • http://files.worldwar2under16s.com/uploads/1/3/0/7/130776500/nidusatejodizigoletu.pdf
    • http://files.califiltrations.com/uploads/1/3/0/8/130873921/maxurenobika_dunagasinigeze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/78990815092.pdf
    • https://cdn.shopify.com/s/files/1/0438/0504/8994/files/vilutekinediwelowibepi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5842/9078/files/git_behind_proxy.pdf
    • https://cdn.shopify.com/s/files/1/0440/3098/4357/files/larojipubusukevekidemekik.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/juboxafaduduba.pdf
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/bugawojufozifano.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/pierre_bourdieu_outline_of_a_theory_of_practice.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/18930700683.pdf
    • https://cdn.shopify.com/s/files/1/0437/0225/5770/files/11386700391.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3567/files/bezegimuwud.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/nurumujas.pdf
    • https://cdn.shopify.com/s/files/1/0429/2644/0607/files/65186690617.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_off00008530.bin
0822998ba9c8b34257068d156a5842a3b39794192ac035be9b29b223409bbbe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8530 5236 bytes
font_01_sfnt_off000096e2.bin
b6fc58e004abb82f9ed29ff4b8ffd5197493878c5b837456ca11a51267a05a09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96E2 10460 bytes

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