Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25a8c057147a01e…

MALICIOUS

PDF

58.6 KB Created: 2020-07-29 17:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d74b33cef3861cbd2e9137d159be2822 SHA-1: 1cf65ac463d8a71760b4e4c9d1e77c7f9cd1a1da SHA-256: b25a8c057147a01e695cc689513303919bf818fd23738975302801cb9fd9a15b
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to search results for a specific PDF title. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=also+sprach+zarathustra+nietzsche+pdf+nederlands In PDF document text
    • http://files.eilenbergerrarebooks.com/uploads/1/3/1/8/131856700/lezipevom.pdfIn PDF document text
    • http://files.dvinesdc.com/uploads/1/3/1/4/131452841/gedojowaduvis-kiwovujakafo.pdfIn PDF document text
    • http://files.perfectprotection.shop/uploads/1/3/0/7/130775949/melizaguxaf.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/1/0434/4204/5090/files/pamujorofikez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0676/2903/files/67254867899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2641/4743/files/83176067945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/55385246006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/24046386270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/11489262963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2914/2426/files/tibekabadapanilesujig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/juganurizupesitopopipan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/vepixibesenepis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/51943496595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8875/6374/files/sirikefozaxarixunabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/43780564374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6489/3345/files/33128713915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.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 4

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_off0000a4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4C0 5164 bytes
SHA-256: 210c6dd3933781d11fd0193c27148f1c682003be891b1daff7c562d053b68d2e
font_01_sfnt_off0000b647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB647 11100 bytes
SHA-256: 11dad464938d6520c838650e06ee8c7f3901504d96effe733f806fcdd2b71563

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