Malicious PDF — malware analysis report

Static analysis result for SHA-256 24cc4408cc4e0e20…

MALICIOUS

PDF

88.1 KB Created: 2020-08-04 03:12:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dde84d10986cad8aab0364fc4e71769b SHA-1: 82950cd4dbd29ec8147d757ac629fc6a6680fe81 SHA-256: 24cc4408cc4e0e20d530d6ae488fc1ba3944e4dfbf660ea9df7b310a8eaf256f
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that leads to the redirector. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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=international+law+of+armed+conflict+pdf In PDF document text
    • http://files.kufunza.com.au/uploads/1/3/0/8/130874250/894553.pdfIn PDF document text
    • http://files.sistersofhope.us/uploads/1/3/1/6/131637773/d3f277d1f7f.pdfIn PDF document text
    • http://pugipata.jeffersonacademypto.com/uploads/1/3/0/8/130814168/tarobijimuraf.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/1/0433/0687/7080/files/dewefezagabujam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3480/4375/files/43007610782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xewujixamugovaginebutomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/giwusimab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/engineering_leveling_guide_classic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/dojubudox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9108/2918/files/xuboniletunujobuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6241/1942/files/28466632989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8531/5739/files/jasixebuwunefasurekutitag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/wamipamonesuwa.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_off00011f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0B 5152 bytes
SHA-256: 2bb9e87f8d33feaa70e7124016326c77d76c9c03f2389af8b9f5c5ee70428aa3
font_01_sfnt_off0001308f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1308F 10236 bytes
SHA-256: 0515f53ff49fb35c34076d9200007869c8677f50a5c7887948cf16c4150caa5c

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