Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae031d3dd110da92…

MALICIOUS

PDF

46.2 KB Created: 2020-08-07 14:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2e1dd6c267ea77b08fe93c090266807d SHA-1: c59b94c052aa8abb53fb360887f3445759e36559 SHA-256: ae031d3dd110da924c5e4cc0ffd9f464c93c36385f18649acecb0a4d2dbe87f6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to redirector infrastructure, designed to trick users into downloading further malicious content. The primary lure, 'persuasive writing checklist pdf', is presented alongside a malicious redirector URL. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests SEO poisoning tactics to distribute malware.

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=persuasive+writing+checklist+pdf In PDF document text
    • http://files.futurescapes21c.com/uploads/1/3/1/3/131398357/8743571.pdfIn PDF document text
    • http://zikor.ryan-wheaton.com/uploads/1/3/0/7/130738720/jetorox.pdfIn PDF document text
    • http://files.foursideddesign.com/uploads/1/3/1/3/131379706/furelijeti.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/1/0438/0088/7457/files/vejowudataxuvudinow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/49097818130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/22707145186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2640/7833/files/84140266845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8180/9563/files/patasukixuvulekuxeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/bagifiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/79674733095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5774/0967/files/83223042223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7034/9731/files/48523118853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4618/1787/files/53376022463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0650/8701/files/elementary_differential_equations_10th_edition_solutions.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 7

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_off000076ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76EE 5632 bytes
SHA-256: 773fd3f1eaae524c9a6be3797ed428cae1eda202f46ee6f01086a738b73c5695
font_01_sfnt_off00008a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A28 9904 bytes
SHA-256: 777b0a0217f2fd22532dc3fd9f2fefb8db21c09e7dc1b66af1417ec897f1dc15

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