Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b6333a1f5bcbd7…

MALICIOUS

PDF

49.8 KB Created: 2020-08-24 22:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bff20abee1a8b18f3bd65bf6142d444 SHA-1: ac063ec919e077b4f7300243854611cf873e181f SHA-256: 03b6333a1f5bcbd77a727fe07884182f64057d1cdbcae187656d409f0591a9ed
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to known malicious redirector infrastructure at `ttraff.com`. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'bribe game free', and the presence of numerous Shopify links indicates a link farm designed to obscure the true destination. The ML classifier 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.com/pify?keyword=bribe+game+free
    • http://files.kimasfashionklosetboutique.shop/uploads/1/3/1/0/131070113/5440348.pdf
    • http://kovobura.sgroiwealth.com/uploads/1/3/1/3/131378950/232377a0cab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/38714593061.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4929/files/pokemon_game_fire_red_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/wugokidewajizixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7148/files/40244982066.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/college_magazine_cover_design_templates.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lekerumukin.pdf
    • https://cdn.shopify.com/s/files/1/0438/5410/2688/files/90977813524.pdf
    • https://cdn.shopify.com/s/files/1/0440/4989/1478/files/26701740077.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/pumuzokexenuwe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007997.bin
34070d1c406680d3a9d2c17766bcf0508f1e3e5288aa5f90d59ed90afd2b0c09
pdf-font-stream PDF embedded font (sfnt) at offset 0x7997 4556 bytes
font_01_sfnt_off00008910.bin
cdd95a7185f53c87b42806b726accb3d92e713633b22cbcd7a037a2110ae1421
pdf-font-stream PDF embedded font (sfnt) at offset 0x8910 10400 bytes
font_02_sfnt_off0000acaa.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xACAA 4324 bytes