Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20c8a0f29c5dfb4…

MALICIOUS

PDF

44.0 KB Created: 2020-07-31 23:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e93483d09af942a8264d6496bc6ffe4f SHA-1: f5eddaca4e90702128a9003bee1a26ae939a4590 SHA-256: d20c8a0f29c5dfb4ec2537e859d0f95ef37cdd8f0d3a1b4555bc2152f5bf1bd5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one identified as a malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains text related to legal documents and the PDF creation tool, suggesting a lure. The presence of a link farm heuristic further indicates an attempt to distribute malicious content or phishing pages. The ML classifier strongly flagged this PDF as malicious.

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=illinois+quit+claim+deed In PDF document text
    • http://files.harrydwyerphotography.com/uploads/1/3/0/7/130738779/bekoduf_bubilano_tonujifu_xitifoka.pdfIn PDF document text
    • http://files.artedelmundoecuador.org/uploads/1/3/0/7/130775735/2140149.pdfIn PDF document text
    • http://files.citrix.mmac.org/uploads/1/3/1/8/131857479/wevukefipaxige_ginamupefinu_jedon_tavaji.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/1/0434/0491/8941/files/how_to_make_a_ender_portal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/85542005800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7364/2389/files/xuritexakoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/8106489612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0720/3739/files/25399628458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2416/1695/files/vubizofok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0357/5454/files/52280409505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0333/7115/files/javasir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1334/0316/files/38806379481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mapitawaluzosamorexub.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_off00007104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7104 5052 bytes
SHA-256: ab4bfa12feff9fa363c98f97e1a3a4bff37c67eedf93506d91fc9fb4ae23c106
font_01_sfnt_off0000821b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x821B 9700 bytes
SHA-256: a8b65563de634fec9708a2e06c4c76ee7cb1d38c4d79bc79ad1ceb86dde79890

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