Malicious PDF — malware analysis report

Static analysis result for SHA-256 841a4d3288d2dc4e…

MALICIOUS

PDF

45.5 KB Created: 2020-07-26 10:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a4968f6628e631f4d0fd6d6440eeeaae SHA-1: ca12e8e21e14c762abfec401fe1a504b8701cbc3 SHA-256: 841a4d3288d2dc4e982f4e2a75b969a97ee37b3cc2229b7304d9e2b52a5eec52
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to what appears to be a link farm designed to host SEO-optimized PDFs. One prominent link directs to a known malicious redirector, suggesting the document's primary purpose is to lead users to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=apa+format+reference+online+article+no+author In PDF document text
    • http://files.liveeatsweat.com/uploads/1/3/0/8/130874253/wifugidegar_wuwol.pdfIn PDF document text
    • http://files.smartspraytan.com/uploads/1/3/2/8/132815298/batexosesimevab_gibidexir_ralenojujagaw.pdfIn PDF document text
    • http://files.emapparelltd.com/uploads/1/3/1/1/131163666/77254c9.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/1/0433/0687/7080/files/nenixuraxolitater.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2811/9706/files/31591787850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/puvuzepimimupovilij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8950/7990/files/51031518805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8107/1782/files/tisobimudoxamuxel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2997/8526/files/vuwezowawilobakalinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8466/1407/files/bapufevulifen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9818/3582/files/25282573445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3301/0081/files/retok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/roxusoraniwurajegiwuzurog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4059/5355/files/miborujinaramaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/fexamux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6787/5221/files/bagiba.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 5

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_off00007579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7579 4948 bytes
SHA-256: 3484350ff2181561bf271dbd33d3a6bca3c722c012c151bcf3451b339017e77b
font_01_sfnt_off00008619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8619 10060 bytes
SHA-256: 9d543b2bb2218fb974bb983b3560e2c59fa6e7585a11fffe2b47dc8ea7db613c

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