Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe0f31f09087d69…

MALICIOUS

PDF

51.2 KB Created: 2020-08-22 10:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 24a3587ae14f2094db759f5328acb5b4 SHA-1: 21efcb4250cf0f19b78b695f1628c2b352880c71 SHA-256: 4fe0f31f09087d69440a6e8f59ef57c8d17e77dba29aaff7f71978703b3eee10
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. The ML classifier strongly indicated maliciousness. The primary attack pattern involves a link farm designed to redirect users to external, potentially harmful, 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.com/pify?keyword=free+able+lawn+care+flyer+templates In PDF document text
    • http://fimiw.justmoredeals.net/uploads/1/3/1/8/131856772/kebupojamoti_liroben_xonesanereduka_bawaligaboda.pdfIn PDF document text
    • http://files.djspizza1.com/uploads/1/3/1/0/131069824/87516f071.pdfIn PDF document text
    • http://kufeki.nonakaconsulting.com/uploads/1/3/1/8/131871991/bimewigi.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/1/0428/5625/1559/files/puzarusaruvipevogutikaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/bexul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/52569492746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ranugebiwuzejivuzuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/spanish_grammar_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2086/0064/files/ketogenic_diet_plan_pakistan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5710/0453/files/17880896670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/alleen_op_de_wereld_boek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8947/5237/files/58978565966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/titrasi_argentometri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5633/9861/files/95_nissan_pathfinder.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_off000089db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89DB 5448 bytes
SHA-256: b67d3bb830452bc4cfe7569778bd7b7a38f1804aa4066ecf8bdb7d76b19ae28a
font_01_sfnt_off00009c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C64 10452 bytes
SHA-256: cba71090538e4232d7026e63ddf089fe470a50cb8c376e5c315ff86efa0f5e4c

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