Malicious PDF — malware analysis report

Static analysis result for SHA-256 61eec196c59cfc21…

MALICIOUS

PDF

40.0 KB Created: 2020-08-05 11:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5eb3e7f4c566a46b7548ae7ba9d8616f SHA-1: 07deddf5a162343c868756f812054f46caba6093 SHA-256: 61eec196c59cfc21dfcecea3d19f4aa8ea40e5cb6da13263661f0370fe49e3df
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links, 'https://ttraff.ru/pify?keyword=frecuencia+cardiaca+pediatrica+pdf', is flagged as a malicious redirector. This indicates the document is likely designed to redirect users to malicious infrastructure, potentially for phishing or malware distribution.

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=frecuencia+cardiaca+pediatrica+pdf In PDF document text
    • http://files.8book.org/uploads/1/3/0/8/130873927/6fe99e743f9f8.pdfIn PDF document text
    • http://files.dalesbootery.com/uploads/1/3/2/8/132814306/20529.pdfIn PDF document text
    • http://files.reparashathashavuah.org/uploads/1/3/1/3/131383673/3216447.pdfIn PDF document text
    • http://files.match-gems.com/uploads/1/3/0/9/130969243/waruxe-gibotusupuwe-viputefetapaj-walugogigebomev.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/1/0431/3897/3857/files/zubijumulesatagok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/vepegubegufegiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/52569169211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1737/1801/files/buvasilujow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0309/2898/files/body_beast_lean_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2380/9187/files/87790247508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4763/2548/files/kupumemitifepaxavesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/61451986607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5758/6071/files/fuvavidaritalenotubasox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/latasoxa.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_off00005e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E04 4896 bytes
SHA-256: 097d3272f7dfd84805e922c332fc44a2f9e6156588337534f235576011881693
font_01_sfnt_off00006ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBF 10764 bytes
SHA-256: c755985c6a5d3ce6dfe33fc415852dcef2297c62a9a5030ca2ab9a3995b9e804

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