Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e46e81294eea09…

MALICIOUS

PDF

43.1 KB Created: 2020-07-28 18:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 413e4ec6f939ae41e23120b1277f92e2 SHA-1: 6ebdc2496788dbc6d543e77a2fd72db148d8664a SHA-256: a4e46e81294eea09ea523f687fa986c0388ad2f5aded3a3c5b1896ac9d6f052f
202 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, specifically linking to known malicious redirector infrastructure and employing a link farm strategy. The presence of a 'download button' heuristic further supports the lure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=mann+whitney+u+test+excel+template, which is likely used to redirect users to a further malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=mann+whitney+u+test+excel+template In PDF document text
    • http://files.mountainbikegreenville.com/uploads/1/3/0/7/130775366/siwibe-gixamasuxeno.pdfIn PDF document text
    • http://files.post111stl.com/uploads/1/3/1/6/131606193/fofulija_puwur.pdfIn PDF document text
    • http://files.ideaventionsacademy.org/uploads/1/3/1/4/131411281/7329677.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/1/0433/5520/9879/files/piveteniwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/zudisobotexili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/75388652185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7383/1066/files/sezosivadelabubarodusura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0797/5330/files/56929647501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5592/2852/files/14284862211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8901/7497/files/pobonikogun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/dapiwusigenixumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/85378648240.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 6

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_off00006b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B89 5116 bytes
SHA-256: 8768cc9462dd08b8b3c3a84adc30c1475e2b99edff18ca2321682716c059f6d3
font_01_sfnt_off00007ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE1 10080 bytes
SHA-256: 1d1648bb7da722377fa3786463165c7fb614d3092639bc57671aae5f487a48d4

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