Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa4da6d942ba423…

MALICIOUS

PDF

41.0 KB Created: 2020-08-13 21:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0db83b47dc2f0746675f3770a2c13e62 SHA-1: 7501437b5f48d6fb0af3cbaa1e69691f7496437e SHA-256: dfa4da6d942ba42311f373a43bb2c76943897d2bb6044904ddad74e71a9b4a60
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially corrupted, contains text related to 'school border paper template free' and includes the malicious redirector URL. The ML classifier strongly indicated maliciousness. The primary attack vector appears to be luring users to a malicious site via a deceptive document.

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=school+border+paper+template+free In PDF document text
    • http://rexoliso.mezzanineboutique.com/uploads/1/3/0/8/130813612/fomidutinosado.pdfIn PDF document text
    • http://files.prime8coding.co.uk/uploads/1/3/1/4/131406505/penavi.pdfIn PDF document text
    • http://wakakod.btcjp.co/uploads/1/3/1/6/131606289/zujel.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/1/0435/2904/4119/files/dojukuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/26896065155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7840/9622/files/62331640677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1631/3242/files/847273226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/13068506459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/la_clippers_schedule_2020_20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/kavebepimezobolenaxazixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1969/7310/files/julumawame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5901/8919/files/angular_js_dropdown_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/xoxeginovapatemobido.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 3

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_off0000614d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x614D 5460 bytes
SHA-256: 5517815ad9b60cac4574d9d8b17456bb97ed097649445c1070bc26a23e01feaf
font_01_sfnt_off000073ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73AE 10428 bytes
SHA-256: 534c7a9125c540c8f840b381f6282834baf6a39b4c758b0cd496d7ef38ef95d4

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