Malicious PDF — malware analysis report

Static analysis result for SHA-256 427d3d3d6eec6f12…

MALICIOUS

PDF

41.5 KB Created: 2020-08-08 17:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6d9556fbfa2e74a600c80ccf89db86a4 SHA-1: c918518df1767690b5aefe1ded9db9c36e87cdf8 SHA-256: 427d3d3d6eec6f129e89a024b56195537100c47c9223fc2721a54f6ca57e04d8
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a malicious redirector link (ttraff.cc) disguised as an English assessment test. This suggests the document's primary purpose is to redirect users to malicious infrastructure. No scripts were extracted from this sample, limiting the analysis of its execution behavior.

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=english+assessment+test+questions+and+answers+pdf In PDF document text
    • http://files.cltreecare.co.uk/uploads/1/3/1/4/131452922/578a3957b5.pdfIn PDF document text
    • http://files.usanaapconvention.com/uploads/1/3/1/3/131398547/5569017.pdfIn PDF document text
    • http://files.renehindsarts.com/uploads/1/3/1/4/131437775/zaboduzevavivafo.pdfIn PDF document text
    • http://files.saeindiana.org/uploads/1/3/1/4/131409037/doketomusobitafuxiga.pdfIn PDF document text
    • http://files.superdiscountwigs.com/uploads/1/3/2/8/132814523/tidut.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/1/0428/0716/5095/files/kipowawoserixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5720/9753/files/4563985400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3587/3700/files/digestive_system_histology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0531/3177/files/41445141003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/24619526838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0381/2773/files/74351070852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6251/6122/files/what_is_a_8801_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3335/3627/files/6470939246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/53618573396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/pewabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9182/0695/files/72953930476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8076/2023/files/64442255830.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 8

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_off000062d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D3 5632 bytes
SHA-256: 6ab0c79d4cacc535e9c01dee69b3c4c46ca4f6caca0e6d2cf59357ecf339b548
font_01_sfnt_off000075df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DF 10228 bytes
SHA-256: 434f8d8df6e53afe72839964f74a8d552b127082b014df1fac36410f91b3514f

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