Malicious PDF — malware analysis report

Static analysis result for SHA-256 87349233c23c58ee…

MALICIOUS

PDF

42.0 KB Created: 2020-08-08 20:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1ea880fe290f9937dc6be66dfb261378 SHA-1: 214c047d36173258bc6ab1163b29034b7546a29a SHA-256: 87349233c23c58ee075161f86ee7ac7bd825cc24f62cee8aacf44dc12ea7ca20
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL, 'https://ttraff.ru/pify?keyword=biostatistics+and+epidemiology+smoller+pdf', is flagged as malicious. The document body, though heavily obfuscated, contains this same URL, suggesting it is the intended destination for users lured by the 'free download' pretext. The presence of numerous SEO-optimized PDF links further indicates a campaign to drive traffic to potentially malicious sites.

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=biostatistics+and+epidemiology+smoller+pdf In PDF document text
    • http://voxibedob.melshand.com/uploads/1/3/1/6/131606407/7d6a6f65ee0.pdfIn PDF document text
    • http://mazesejit.barbiescookies.com/uploads/1/3/1/4/131407406/9212591.pdfIn PDF document text
    • http://files.therapymcb.com/uploads/1/3/1/8/131856574/xopakukuxoguri.pdfIn PDF document text
    • http://busiziz.arlenespiegel.com/uploads/1/3/1/8/131871721/kufurijiter_fuxodatizozuda.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/1/0443/3005/7884/files/advanced_algorithms_computer_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zexula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/79990084495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5298/9605/files/99436613336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8129/3221/files/bepaxolapubenape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8378/3575/files/91611094524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8333/files/42989691091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/ripik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7440/5020/files/73049240848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7433/8472/files/suzezodofowobiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/php7._2-_fpm.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_off00006574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6574 5624 bytes
SHA-256: 77fbc22e451937ad666c51896592f99e4dc67b02827a93f247d36bb095698e26
font_01_sfnt_off00007891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7891 9980 bytes
SHA-256: 64ee1b3cf4c9b66c0056c5e10a09cbb6962899fcf68ef7db0117c72863d38d34

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