Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ecf612af6d56e5…

MALICIOUS

PDF

45.9 KB Created: 2020-08-04 18:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 208299315e19c236cce96f54b67e13d7 SHA-1: 626aa05678fa968077591b5d15189561d6fc1870 SHA-256: 06ecf612af6d56e5e385d872d1c2c8d0aa633c18bf8cf977f014f72a7021521e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector URL (https://ttraff.ru/pify?keyword=astm+e8+69+pdf). Another critical heuristic indicates a PDF link farm, suggesting SEO manipulation or a large-scale distribution effort. While no scripts were extracted, the presence of malicious links and the ML classifier's high confidence point towards a malicious intent to redirect users to harmful content.

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=astm+e8+69+pdf
    • http://files.micasitarentals.com/uploads/1/3/1/4/131406744/tibitu.pdf
    • http://files.joysingarayer.net/uploads/1/3/2/8/132815054/63a178abb7d.pdf
    • http://files.quoisdesigns.com/uploads/1/3/0/9/130969923/fb993.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/xirezusenupinofusi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5610/files/wamolepubakizevele.pdf
    • https://cdn.shopify.com/s/files/1/0438/2497/1936/files/1706022331.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/93762708354.pdf
    • https://cdn.shopify.com/s/files/1/0429/9449/9743/files/zuzifigasutasaga.pdf
    • https://cdn.shopify.com/s/files/1/0429/0412/5599/files/57446817414.pdf
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/80240126836.pdf
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/22025419230.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/lobepolegifalur.pdf
    • https://cdn.shopify.com/s/files/1/0430/3172/4183/files/zuxuma.pdf
    • https://cdn.shopify.com/s/files/1/0439/1777/0920/files/72419595583.pdf
    • https://cdn.shopify.com/s/files/1/0430/9418/0001/files/27197316899.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/kipesupeminoxakafomubaje.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/5993/files/how_to_reinstall_ffxiv.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_off00007501.bin
b51c702c53d3cc198f36746577151381920857a1b9b9e2c7c8526d5fc6cf1adf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7501 5344 bytes
font_01_sfnt_off00008722.bin
204b59e6750e652f4a04eaaafe4d9f76b407c9ffe82f366a35522ce35dbe931d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8722 10476 bytes

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