Malicious PDF — malware analysis report

Static analysis result for SHA-256 53fe4c4373cdb4cd…

MALICIOUS

PDF

49.6 KB Created: 2020-08-09 19:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 85cf26f528e4d41768a8a46b3faf6bab SHA-1: 3e8a0c0c1b85e9309c68c12acf6b91e718614d3f SHA-256: 53fe4c4373cdb4cdaea7b36d583585d830d1a049add7faf83d5933f22df16910
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=vitamin+b9+deficiency+pdf'. This indicates an attempt to direct users to malicious infrastructure. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. The primary intent appears to be luring users through a deceptive topic to a malicious site.

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=vitamin+b9+deficiency+pdf In PDF document text
    • http://files.longcrendonfilmclub.com/uploads/1/3/2/7/132740905/zizeninuminezi.pdfIn PDF document text
    • http://labamef.actionins.net/uploads/1/3/0/7/130776208/zokabibakozebofewos.pdfIn PDF document text
    • http://files.confluentdesign.net/uploads/1/3/1/3/131382274/9b325a4.pdfIn PDF document text
    • http://files.kcgardenclub.org/uploads/1/3/1/4/131483154/pumugoxe.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/1/0431/2023/0564/files/denizukuxumew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6703/1200/files/44863370879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/96864299976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/nodojuvavuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4792/5413/files/bb_clarinet_finger_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7240/5157/files/kazebojawaketipasaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32732230761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7854/9665/files/5128952713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2232/5672/files/data_structures_and_algorithms_by_balaguruswamy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3320/6690/files/c_clear_input_buffer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0890/0768/files/juvaguwegilobiwuxojos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/33465675432.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_off000085d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D9 5356 bytes
SHA-256: a2813f6be0d9b400f70c0cad79b24a4f658d402f60b8796a46dc5a18ac7529b4
font_01_sfnt_off00009812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9812 9796 bytes
SHA-256: 9f872a5c91bdddf7d84e3489b8e8343891d618cdd0b1e2c6c4e1c6c5b437a443

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