Malicious PDF — malware analysis report

Static analysis result for SHA-256 7235f89a1fa6b703…

MALICIOUS

PDF

96.7 KB Created: 2020-08-15 20:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 850f0a6bd93c372aaf31419d11b34f20 SHA-1: a2cd7a5ccd837b9380c943a4e729417bb1fb1357 SHA-256: 7235f89a1fa6b7036a4201a85159aee5051d2398876be5515e2ff04d115926cf
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains text related to a 'garment export house project report' and the malicious URL, suggesting a lure for phishing or malware delivery. The presence of numerous external links, many pointing to Shopify-hosted PDFs, indicates a potential link farm or content-spinning operation.

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/pify?keyword=garment+export+house+project+report
    • http://kogovisop.jgaudioproductions.com/uploads/1/3/1/0/131069934/fajobonem.pdf
    • http://files.adnpfoundation.org/uploads/1/3/0/7/130776263/jiluvuberi.pdf
    • http://nokulefuk.pinnaclechristian.org/uploads/1/3/2/3/132302782/dojisapatunu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/lajavaliwokupufodegi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3823/5031/files/pivafepowexosabikawejijad.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/25081765949.pdf
    • https://cdn.shopify.com/s/files/1/0434/4292/9821/files/xipen.pdf
    • https://cdn.shopify.com/s/files/1/0436/3704/7449/files/www._bteb._gov._bd_exam_routine_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/17846996059.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/eugene_bozza_badinage.pdf
    • https://cdn.shopify.com/s/files/1/0439/2547/1400/files/44438741016.pdf
    • https://cdn.shopify.com/s/files/1/0430/5344/9367/files/bazefanitir.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_off000133b1.bin
db3f304703835dd53f93c732882b819a0332594542b8ce7190ea222259c77c28
pdf-font-stream PDF embedded font (sfnt) at offset 0x133B1 5316 bytes
font_01_sfnt_off000145a0.bin
8dbf28587ebb13a4070321590d9e8efb6acba95c92cc2a7d98328edb852b566d
pdf-font-stream PDF embedded font (sfnt) at offset 0x145A0 15792 bytes