Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a29ede83d7a115…

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 08:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecd772d43d2cca0d088a3112eea9e738 SHA-1: 2259cf28ad48e98a71b79c1b742da861b1c9c630 SHA-256: 76a29ede83d7a1159b7c3ddc7301b6ee206955894223206406a4882b540f22ce
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 of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to "Wii console manual troubleshooting" and the malicious URL, suggesting a lure to trick users into clicking through to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wix?keyword=wii+console+manual+troubleshooting
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/visutasem.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/46300344206.pdf
    • https://cdn.shopify.com/s/files/1/0432/4062/0200/files/29038396072.pdf
    • https://cdn.shopify.com/s/files/1/0432/7260/1756/files/24653880002.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/rosekiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9570/4227/files/7362428516.pdf
    • https://cdn.shopify.com/s/files/1/0436/9226/1529/files/personal_leadership_development_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8864/files/look_back_in_anger_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/warerisomovu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4184/7458/files/samewujajadinuromene.pdf
    • https://cdn.shopify.com/s/files/1/0431/4493/7623/files/60ktyz_synchronous_motor.pdf
    • https://cdn.shopify.com/s/files/1/0432/3259/2040/files/73117197052.pdf
    • https://cdn.shopify.com/s/files/1/0435/6089/4627/files/wijamadurowopovagi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5781/files/nalowewalonaluwo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1146/5638/files/15865204263.pdf
    • https://cdn.shopify.com/s/files/1/0430/3178/9721/files/pifixi.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_off00005f12.bin
57a9f7e535fe2d6cae7e56a878f60437728575afaa45dea52bf2a723202a8295		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F12 5364 bytes
font_01_sfnt_off00007124.bin
bbbf02155afaf1c09bd1778552428501c41be31e032f1720a658c7f8e3d979c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7124 9768 bytes

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