Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ce5e5b7cf6df11…

MALICIOUS

PDF

51.8 KB Created: 2020-08-18 14:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f481feeedc927b53f6aceb659ea60a5e SHA-1: 33047393e6cc86bff33a0b05457c93226315acc1 SHA-256: e1ce5e5b7cf6df115fe0f0e4bfd389ca386945cafe5017b5d50a460825948342
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 numerous embedded links. One critical heuristic identified a malicious redirector link pointing to 'ttraff.ru', suggesting a phishing or malware distribution attempt. Another heuristic noted a large 'PDF link farm' with 24 external links, many hosted on Shopify, indicating a potential SEO poisoning or link farm strategy to distribute malicious content. The document body contains garbled text but includes the same redirector URL and several Shopify URLs.

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=platform+technology+in+pharmaceutical+ppt In PDF document text
    • http://files.historicalartandconsulting.com/uploads/1/3/2/7/132712000/05cc6.pdfIn PDF document text
    • http://files.karynpearson.ca/uploads/1/3/1/4/131438018/wemerobik.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/1/0434/3994/7932/files/88599937271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/6845/8917/files/wepomulom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/59705142754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/14479129975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/18340168800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6533/5208/files/nubogefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/25123758157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1909/2647/files/jepokirabazabojuroxek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8812/5857/files/lotobab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/3919694745.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_off00008b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6E 5356 bytes
SHA-256: f8641eff6a2d970c4694d49e6ed7976a402a19633f8cb33f79b9bfce56d45233
font_01_sfnt_off00009d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D86 10692 bytes
SHA-256: db333122033fa5e6a009a9b88f76ee67563b92f8ad60d95aef22d8fe4bd81afc

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