Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f83896b3e716c3…

MALICIOUS

PDF

40.5 KB Created: 2020-08-21 16:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4a17f01e15d928fd57c2d61ed86dc9ad SHA-1: a81c87462ab0dc0d85cf90d8a4d80bd8ed1cb9fd SHA-256: b4f83896b3e716c3699a51c194064f49c49339cf0c38cf4281c854d31d92a8cc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains embedded JavaScript which is flagged as malicious. This script is likely responsible for the critical heuristic firing indicating a PDF link to known malicious redirector infrastructure. The primary redirector URL is https://ttraff.ru/pify?keyword=search+multiple+excel+sheets+at+once, which is used to lure users to potentially malicious content. The document body also contains this URL and references to SEO link farming, suggesting an attempt to attract traffic through deceptive means.

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=search+multiple+excel+sheets+at+once In PDF document text
    • http://files.londonderrychristianmontessori.com/uploads/1/3/1/1/131163747/1987567.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/1/0433/2093/4558/files/dupex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6094/4296/files/51340251643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/4672230199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/52983573214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0687/6055/files/appchina_free_ios.pdfIn PDF document text
    • http://files.lkong.people.ua.edu/uploads/1/3/1/6/131636819/c2e358ec.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5198/2754/files/wugatamazabexuwakejovoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7405/1493/files/63978113061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xasaxikopakepiditewevumub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/zufulufenolefalisagorafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/99750700135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/xararanoxubapevusijezej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0491/7917/files/javascript._overlay._slice_0_100._click.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 1

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_off00005fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB4 5344 bytes
SHA-256: 3a9509e4f9a440f4d427becdf9122a5cfeb2997e5d6e88ced367fa921ab04295
font_01_sfnt_off000071b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B7 10408 bytes
SHA-256: 015b7d6fc3bfb91840a682b8499befaaa3432f5a725c8c08782584e0a1a581a7

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