Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54bd03cac2aa7d5…

MALICIOUS

PDF

44.8 KB Created: 2020-08-21 16:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3306e998ffad1968ff165730cf70fa8c SHA-1: 3c7f25ba4a9d9f8d86674d01d0b7f8bdc11db2c6 SHA-256: c54bd03cac2aa7d5e8eda9aaa8d139f52b747e1ba0b7cc2f0f63fc3b251b865a
202 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. This indicates a link farm or redirection attack designed to lead users to malicious content. The presence of urgency language further supports a malicious intent, though the specific payload is not directly executed from this file.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=brassica+rapa+fast+plants+information In PDF document text
    • http://files.furdinez.com/uploads/1/3/0/7/130739076/fb15d741a4f39f.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/1/0431/5856/9128/files/zupekolilakotebew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/ninugeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/pivolusawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/occupational_therapy_toolkit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/chiari_malformation_type_1_measurements.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7514/7678/files/terry_eagleton_culture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9567/0427/files/zopuriwewinomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7491/0376/files/nokosepaxuvogepanotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3945/6423/files/teboxusedaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7115/8949/files/xizumifadeberegowazizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6054/3138/files/download_systools_split_and_merge_tool.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7762/3201/files/87767257832.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_off00007183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7183 5212 bytes
SHA-256: a5f35009e6b225b99f55565580107aa5287c703325f3609d07258f79c15c26d3
font_01_sfnt_off0000831f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831F 10348 bytes
SHA-256: fcea5282645b49a4b2f7d37661cd75109e532f4f7cd076aa50b6fef6f6b1c4d7

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