Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a9e761fe1320ff…

MALICIOUS

PDF

41.1 KB Created: 2020-08-25 12:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e467f4269bbe8ead2eabf93ad38ac4ed SHA-1: c71aca6150c080500a7a2f0444e979030f3432ca SHA-256: 33a9e761fe1320ff8ebb01f04543be026a8a89ea6e921984ee559721bcfd03ed
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.ru'. Another critical heuristic identified a PDF link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier strongly supports the malicious nature of the file. The presence of numerous Shopify-hosted PDFs, alongside the malicious redirector, indicates a likely phishing or scam campaign leveraging these links.

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=anime+er+app+for+windows In PDF document text
    • http://files.krislibrary.com/uploads/1/3/0/7/130740442/1fda0f35313.pdfIn PDF document text
    • http://rudatujo.nanni.info/uploads/1/3/1/4/131406717/gebovu.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/1/0432/6483/5737/files/creative_cv_design_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/77743345799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3493/4429/files/pakipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2341/6987/files/57506250444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3037/1738/files/acido_sulfurico_amelie_nothomb_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/wejunivoseki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3975/9255/files/benjamin_moore_advance_pearl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8814/9668/files/xuwexot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/sadadomawopujavila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6462/2246/files/tawinexirubesojobomive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7019/2802/files/social_media_marketing_agency_website_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/87264529915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/68966854508.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 2

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_off000063c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C6 5236 bytes
SHA-256: 9cad421913fc3387abca6255ca4621e31662c62f87a713860a79afed03d04948
font_01_sfnt_off00007585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7585 10000 bytes
SHA-256: 37629bb3468a3bda6faa6764ec85828314e6f6e68c38b53620874f903408f1bf

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