Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71b827384b3c318…

MALICIOUS

PDF

48.1 KB Created: 2020-08-08 23:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8e5115c7c7a4cf4bb7cbf41818c3ca9c SHA-1: 7dae7496e03a55380d33baa8853802114545bb26 SHA-256: b71b827384b3c318d54aa85a3d02bd1b962867aa7cdb40ce483ec12431a50db6
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a link farm pointing to a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=alcor%25C3%25A3o+comentado+pdf. This suggests the document is designed to lure users into clicking through a chain of links, ultimately leading to a malicious site. No scripts were extracted from this sample.

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=alcor%25C3%25A3o+comentado+pdf In PDF document text
    • http://files.learningandwriting.com/uploads/1/3/2/8/132814050/xepopikusewajijin.pdfIn PDF document text
    • http://files.pianomanlarryhunt.com/uploads/1/3/1/6/131606670/dopofe-pusumixuwoje-xekakefowi-xisevenizajare.pdfIn PDF document text
    • http://files.pgfintegrations.com/uploads/1/3/2/6/132682640/af1d5d8a914e63.pdfIn PDF document text
    • http://files.purplepandaglitter.com/uploads/1/3/1/1/131163976/5490222.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/1/0432/6660/5219/files/94417191106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5385/0524/files/58731797559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/94377596149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8904/0294/files/intel_graphic_media_accelerator_950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/61663217382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0867/2423/files/96468566137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/popujokewivelugugev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0617/3081/files/argala_stotram_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8712/5927/files/62256359152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6159/8616/files/watch_naruto_shippuden_476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/suvejolobokipafato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/93708664581.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 5

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_off00007a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8C 5428 bytes
SHA-256: 1dedf2702cb2bcfd86aacc59cae80984c3a9bf1899956d59c55529bbcb247fe5
font_01_sfnt_off00008c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5C 12452 bytes
SHA-256: 4687e89ae651563097291f85437596a916df2ad9d4abf2fca589c56261d0a415

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