Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb96e4eaee66bcb…

MALICIOUS

PDF

49.4 KB Created: 2020-08-15 22:40:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 87c35dc15842e6e18288703b2aebde04 SHA-1: 25072d67f17753035075dfdea5f486aae6e9812e SHA-256: 4eb96e4eaee66bcbd503fb7fb738d1415f4137afd654d5e7e792553e3fb03a0a
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body, though partially corrupted, contains text related to 'coronary artery disease article pdf' and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent. The presence of numerous Shopify-hosted PDF links indicates a link farm strategy to improve search engine ranking and distribute malicious content.

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=coronary+artery+disease+article+pdf In PDF document text
    • http://files.barnfinddazzled.com/uploads/1/3/1/8/131872105/ec4c01f3d9.pdfIn PDF document text
    • http://files.noiinsw.com/uploads/1/3/2/6/132683088/ximitazugavobom.pdfIn PDF document text
    • http://files.michaelstiertherapy.com/uploads/1/3/2/8/132816096/gibojifajimi.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/1/0428/6555/7671/files/history_of_english_fiction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8316/0983/files/jemojenevawik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/davipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8176/8872/files/my_sql_commands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5145/6411/files/lobumifivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/jalusajasulugusija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/3457752150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/39817894484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3272/4124/files/57250628612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/kodogalabav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1859/8038/files/31125238222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5045/1623/files/anatomie_systme_respiratoire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/47607256478.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 8

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_off00007ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCC 5156 bytes
SHA-256: 583d41dac17d9ffc8e615a6969f9b103a78292782e25e48ee45f82718e47a783
font_01_sfnt_off00008e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6E 13284 bytes
SHA-256: 9f13452f942cb8ce2cd376e29cff4b11edde7ce480fa2a24fd7c5730955e637a

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