Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4f9634145c1efe…

MALICIOUS

PDF

41.8 KB Created: 2020-08-06 05:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 17eeb539c4a6165a73460781f54572d8 SHA-1: 87d001013c938a399a9a0c22d93f84f590ec1e1c SHA-256: fd4f9634145c1efe15f4a971caa12b331e393e1daaf6830bb7944dfb301c1e1b
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which likely serves as a lure or initial access point. Another critical heuristic indicates a large PDF link farm, with many links pointing to external PDF files hosted on domains like cdn.shopify.com, suggesting a potential SEO manipulation or content distribution scheme. No scripts were extracted from this sample.

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=auxiliary+verbs+pdf In PDF document text
    • http://files.cure-sort.org/uploads/1/3/1/3/131378990/3248812.pdfIn PDF document text
    • http://files.rosannavanmierlo.com/uploads/1/3/0/7/130775126/zebemekaxud-dobezerejarosop-nexumejosar.pdfIn PDF document text
    • http://files.swissblisstravel.co.uk/uploads/1/3/0/8/130814258/107adc026dc8.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/1/0430/8316/9943/files/rarixigonixagoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/zedupekerirelibigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8563/4463/files/44228419017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8873/0525/files/34176504530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0607/4778/files/biogas_plant_project_for_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39843759369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0273/2448/files/fred_boat_commands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/pupilifizorakadukiwajudis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5035/3318/files/zekaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1238/2116/files/40503214178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5205/6227/files/13482128959.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_off00006701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6701 5392 bytes
SHA-256: d6ddb2d5dbe6695b21432b9b78e201218b6ba33990c447bb3c55b7036b1d1795
font_01_sfnt_off00007971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7971 9948 bytes
SHA-256: f88b9460ed3d620876476ae17ea18b37a567f81c8fa64a14913c9c239551d384

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