Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d68c4135b552512…

MALICIOUS

PDF

34.1 KB Created: 2020-08-31 20:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13b4dd409701a1d402288d7acb04c9bc SHA-1: 47438efe78ec7278bea43b9000422910a62af22e SHA-256: 7d68c4135b5525126f015cc3b2aa1da20cb513273e5ea0afb7363cd5fc701ab4
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominent URL leading to a redirector associated with malicious activity. The document body, though heavily obfuscated, contains text referencing 'Chicken invaders 6 setup for pc' and the URL https://ttraff.link/wix?keyword=chicken+invaders+6+setup+for+pc, suggesting a lure for a fake software download. The presence of numerous PDF links, many pointing to Shopify, indicates a link farm strategy, likely to improve SEO for malicious content. 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.link/wix?keyword=chicken+invaders+6+setup+for+pc
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/3671/0824/files/gipinuxabodoxojoxodikojaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/89815498299.pdf
    • https://cdn.shopify.com/s/files/1/0432/6175/5547/files/72556349497.pdf
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/wegikojegejokanirawe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5367/0822/files/59977809699.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/6678725640.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/les_articles_contracts_fle.pdf
    • https://cdn.shopify.com/s/files/1/0436/7283/0105/files/5433539494.pdf
    • https://static.usrfiles.com/ugd/b8c837_1587aea5e0934618be9b5e73dd47a9df.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad908162b8fe44ed80bf2d3668d8be69.pdf
    • https://static.usrfiles.com/ugd/8acad3_5ed71887fcb8475c80d183b5267bcb0a.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_off000047b9.bin
05ab5ba3cb0cdec88c6267f344cd9b67119354445e9c31d8f033cdc0fe6811db
pdf-font-stream PDF embedded font (sfnt) at offset 0x47B9 5396 bytes
font_01_sfnt_off00005a0d.bin
8fd13216672c4f3c7c019c406bf55bfb0cb2b4826c1bf30efe0bdd7c60b3427e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0D 10016 bytes