Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e1026774b88d9f…

MALICIOUS

PDF

50.0 KB Created: 2020-08-19 00:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35b57e4758ce6ad8b52782424f4fc732 SHA-1: 2e30d4da2e075bd9723e1c697bc127cf787e928b SHA-256: 05e1026774b88d9f7f15de5686644e2f93775acf99251e61724ba505a581a915
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically directing users to 'https://ttraff.ru/pify?keyword=brain+out+game+level+41+answer'. The document body, though heavily obfuscated, appears to contain this URL and other links, suggesting a phishing or scam attempt. The presence of numerous embedded links, many pointing to Shopify, indicates a link farm strategy, likely to obscure the malicious redirector.

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=brain+out+game+level+41+answer
    • http://files.siwanhill.com/uploads/1/3/0/9/130969386/3053182.pdf
    • http://files.poodleskirtstudio.com/uploads/1/3/1/3/131380181/seviruxibivaravul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9602/3975/files/10118481471.pdf
    • https://cdn.shopify.com/s/files/1/0450/6199/6694/files/boring_machine_types.pdf
    • https://cdn.shopify.com/s/files/1/0431/8740/4968/files/412396812.pdf
    • https://cdn.shopify.com/s/files/1/0438/3899/6642/files/bluestacks_3_for_pc_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91300886864.pdf
    • https://cdn.shopify.com/s/files/1/0435/3844/8548/files/xasisefupev.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/diripekuzew.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/concepto_de_auditoria_administrativa_segun_autores.pdf
    • https://cdn.shopify.com/s/files/1/0434/9142/6469/files/public_relations_principles_strategies_for_professional_success.pdf
    • https://cdn.shopify.com/s/files/1/0429/2539/2035/files/23273989455.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000669a.bin
1c9818b8dbd90b6121896a200fe4cc1a13d136d9cd20d103e1dacef97536d16f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669A 5348 bytes
font_01_sfnt_off000078d6.bin
318aca83c197c26fd0dd6e499f3f34db6a313e079e73af6bc9cadad4aded4064		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D6 14136 bytes
font_02_sfnt_off0000a508.bin
ef84531c4ee8e050e79f254b631b71be579e3412df4068cc3f0059199db927bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA508 16440 bytes

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