Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a6409128dc9557…

MALICIOUS

PDF

44.0 KB Created: 2020-08-25 23:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4f978364424bab03723683ad9d45187c SHA-1: c563536cda19696fd4171732937168ff6e836792 SHA-256: 01a6409128dc95579592645f1051fd773ce577cb687810ad014d123011e84aff
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirection and a link farm, with a critical finding of a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics and IOCs, suggesting a phishing or scam attempt. The ML classifier strongly supports the malicious verdict.

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=indian+business+case+studies+pdf In PDF document text
    • http://files.paulspipes.com/uploads/1/3/1/3/131379894/88aaf03.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/1/0439/3864/4123/files/jejagujibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0654/9406/files/motegakixesuxaxalurit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9065/6921/files/24986028785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0491/7917/files/accidentes_de_transito_en_el_peru_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0405/0084/files/tetowososoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5714/4230/files/pejek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6991/3753/files/vezuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7489/3477/files/bangalore_pin_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9903/6573/files/lean_bulk_diet_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1109/4174/files/buffer_app_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2173/6859/files/13908276306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7360/9636/files/13872565841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/16871320761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3859/5482/files/20147065535.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 2

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_off00006f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5F 5096 bytes
SHA-256: b04029a35ed2dc8f161099ce554bd096ee6e5641493049953557b41ca08b6143
font_01_sfnt_off000080be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80BE 10012 bytes
SHA-256: 2e42a0782e8ecf3cdff1603eda0abdfcc1b3484f391e7dd94cac28234d38b594

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