Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d321736487f32cd…

MALICIOUS

PDF

40.5 KB Created: 2020-08-11 19:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e532f42ca2b940f9c28d6e8f9e8035f SHA-1: 74cf886fe1c3b1ae3acc673149306fd1b9ba4b1d SHA-256: 5d321736487f32cd8c425f5ec54b6e21ef26992cdfe8613587e320368c7d50f6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a reference to 'wkhtmltopdf', indicating the PDF was likely generated programmatically to host these links. The presence of embedded URLs and the link farm heuristic strongly suggest a phishing or malware distribution attempt.

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=present+perfect+continuous+tense+examples+pdf
    • http://files.dmcihomesrealtor.com/uploads/1/3/2/6/132681560/xanufarenedob.pdf
    • http://widis.firstpreslivingston.org/uploads/1/3/2/6/132681579/donoba.pdf
    • http://files.colwynnetballclub.co.uk/uploads/1/3/1/1/131163856/rafifovuwon.pdf
    • http://files.jessicaleemanton.com/uploads/1/3/1/3/131384115/ledugirafunituzufo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1313/4741/files/toxopu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7600/9622/files/banking_practice_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/6395/1003/files/90001458029.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/lowes_mountain_home_ar.pdf
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/xuwijujasa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2113/1161/files/gucci_mane_off_the_leash_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/74179090618.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/11300684547.pdf
    • https://cdn.shopify.com/s/files/1/0431/1796/9570/files/zazesi.pdf
    • https://cdn.shopify.com/s/files/1/0439/5083/3822/files/4701966883.pdf
    • https://cdn.shopify.com/s/files/1/0431/0663/1833/files/methodical_deception.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/sop_apgar_score.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_off00005e02.bin
62e0ade36cdd6baa75b2d358c801a48eae45492d9fc6e8d425a2cc74fcf84a6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E02 5372 bytes
font_01_sfnt_off00007025.bin
ee533f79b8943f5ce770bcd763eed3ec0de8a573e4c34d613c46a3f0f179a274		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7025 10336 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.