Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca7ee964e2ac221…

MALICIOUS

PDF

54.0 KB Created: 2020-08-04 16:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb768a885ed38b30d43751cc045f5b83 SHA-1: 7fd7cacf1652a36ce465b699e0cbfbf3278e0d74 SHA-256: eca7ee964e2ac2218dff6df55a28ba121324f418908d6ce1efb3d2ce35d58204
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=medical+embryology+pdf', which is a known malicious redirector. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, including benign Shopify links and other unknown domains.

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.com/pify?keyword=medical+embryology+pdf In PDF document text
    • http://files.adaptingtohearingloss.com/uploads/1/3/0/9/130969774/nuxitepudukogoxaf.pdfIn PDF document text
    • http://files.chatinfrench.com/uploads/1/3/1/0/131070231/754114.pdfIn PDF document text
    • http://files.rmmarketingservices.com/uploads/1/3/0/8/130815009/7381031.pdfIn PDF document text
    • http://files.eatwithjames.com/uploads/1/3/2/7/132712088/8168614.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/1/0428/4458/6140/files/39471052310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8953/4869/files/40010721071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5388/3293/files/80051549542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9097/6673/files/notibedodavabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23063093424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0862/0701/files/dozif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/39244239527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1342/9655/files/kupujefunumawug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/kinopuseluvoxob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/jepodakagefukixuremek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6180/4197/files/13638373427.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_off00009358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9358 5544 bytes
SHA-256: 969b13e005bd78a5ce225d195cd4fb533ffe7b92bb9ba2a2b84199f5b41a4f86
font_01_sfnt_off0000a631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA631 11644 bytes
SHA-256: a5ae5702f89ee769c927cccc58e34da4af1bac76aa001aee2f0c124b10e1e818

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