Malicious PDF — malware analysis report

Static analysis result for SHA-256 721984ed3a27488b…

MALICIOUS

PDF

46.5 KB Created: 2020-08-05 23:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f9c7eabfdcc052a7671c065a5d203417 SHA-1: 5885127e5ef8659429851a09b9e1675ae2c5182f SHA-256: 721984ed3a27488b7a16882b64993e63f8052ab850a33c8be12ebf42d8114976
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL, indicating a phishing or SEO scam. The document body, though heavily obfuscated, contains the same redirector URL and references a preparation guide, suggesting a lure to a malicious site. 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.cc/pify?keyword=preparation+of+alkanes+with+mechanism+pdf In PDF document text
    • http://files.alystringeryoga.co.uk/uploads/1/3/0/7/130775137/xozisulug.pdfIn PDF document text
    • http://files.rockinluxe.com/uploads/1/3/0/7/130739202/9c441b344f1.pdfIn PDF document text
    • http://files.sccasa.us/uploads/1/3/1/4/131453250/7927498.pdfIn PDF document text
    • http://files.troyeducationassociation.org/uploads/1/3/1/4/131452821/bejava_putugesemuroko_zakok.pdfIn PDF document text
    • http://files.plantbacteriology.com/uploads/1/3/1/4/131454850/piwavavowok_texuvaxodemov.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/1/0437/9040/1687/files/nijelubowutodijedazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9462/1862/files/rosetta_stone_english_torrents.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3593/5398/files/jenajaxodinad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/29166663917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/sunorobizurasotozegikisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/absolute_java_5th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/66385574351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/tablatura_capricho_arabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/12197670701.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_off00007572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7572 5552 bytes
SHA-256: b407e3abd6f5e2200d9a1f21fb67eba4e8abcb81ddc04f254cee63f7fd9c5b93
font_01_sfnt_off00008838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8838 10620 bytes
SHA-256: fdf911d33206bf621552dc635e9bbbcfe6fb40eb905bf35d994c841172ef6cca

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