Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9ee185ce334ba7…

MALICIOUS

PDF

40.5 KB Created: 2020-08-24 20:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9bdff640a7f088e4c5bdf2891cd25d17 SHA-1: 34b2e7b880bb971dc1e35e2b1d19410896051abb SHA-256: 4e9ee185ce334ba751dcf97258330f1c01d5cb976727cd7f0d5cc2017636debb
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and references a 'Hyperlipidemia guideline 2018', suggesting a lure to disguise the malicious intent. The presence of numerous Shopify-hosted PDF links further indicates a link farm designed to obscure the malicious destination.

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=hyperlipidemia+guideline+2018 In PDF document text
    • http://files.amitycart.com/uploads/1/3/0/7/130739081/a5494ffb3fc.pdfIn PDF document text
    • http://files.drmichelle.me/uploads/1/3/2/6/132683070/a95d5bc614.pdfIn PDF document text
    • http://files.normaniclothing.com/uploads/1/3/1/8/131858592/vozegunowilulupezej.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/1/0433/4754/2175/files/descriptive_research_paper_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/disilapugifadevoregipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5104/8357/files/23229258852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/zewegunotas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7994/9718/files/29079957780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3113/4365/files/42777610638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/wuzupavupenedijuratoxoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/tisuwoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/steam_boiler_operation_and_maintenance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5335/0040/files/barabanki_map.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 4

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_off00005e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E95 5684 bytes
SHA-256: 1111880bffa2bbd2d40d3d0f5c2b0de327892da9d50bde6b12fe9cb6b6a9c752
font_01_sfnt_off000071de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71DE 10512 bytes
SHA-256: 904417501f9064ff0828309c53f0a1edf0acda1269fbbb8efe8d3c644554696a

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