Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad2929f22ac3353…

MALICIOUS

PDF

35.9 KB Created: 2020-07-31 15:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b4baaef32ca52828cac626583287d219 SHA-1: 3832e235b2ad7fea6995d5a8d4c54c1c8d6f5339 SHA-256: 8ad2929f22ac3353bc3067932a1a7ecbd62abc6bad6a212e49a0f6490cda305e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm heuristic, with numerous external PDF links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of the 'how to add notsobot' keyword in the malicious URL suggests a potential lure for malicious bots or services.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=how+to+add+notsobot In PDF document text
    • http://files.bergenphotography.net/uploads/1/3/2/6/132682204/1172733.pdfIn PDF document text
    • http://files.njagc.org/uploads/1/3/1/4/131437865/tuxafepukodoj.pdfIn PDF document text
    • http://files.bluegalactictech.com/uploads/1/3/0/9/130969489/rosoxulotujawowipuw.pdfIn PDF document text
    • http://files.draysonquarterbackacademy.com/uploads/1/3/1/4/131482915/felilon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6453/2900/files/32454787888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3624/5144/files/gezogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/80269634340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/52062028834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/79776150519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0371/5489/files/malogelepowuralefepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/raduliwebunixutex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/wabaxuditenokeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3002/7157/files/23223396026.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/batuda.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000524e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x524E 4504 bytes
SHA-256: 99872a5a674b70a6b698728e01f17587e4b6ac5161672c58e8e7126d5a230d78
font_01_sfnt_off000061a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A2 9744 bytes
SHA-256: d858b748f5c077626699eb24d9fb9f042a4e1df1e19385f470edf4eec08dcebc

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