Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66b8d12efa4b332…

MALICIOUS

PDF

46.8 KB Created: 2020-08-23 04:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8c4d32b35d1c772e8b2dda3a0c048bba SHA-1: 4d380bccb27bfa27e29132554eb60a3787fc8682 SHA-256: f66b8d12efa4b3325e38e7ac570f99a745a6a856288da88783648223e2292656
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Neopets avatar guide' and the redirector URL also includes this keyword, suggesting a lure. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the malicious nature of the redirector. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, many hosted on Shopify, likely to obscure the malicious destination.

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.ru/pify?keyword=neopets+avatar+guide In PDF document text
    • http://siweb.carolmeadsart.com/uploads/1/3/1/4/131453960/40bac6d1884291b.pdfIn PDF document text
    • http://files.warkprimaryschool.co.uk/uploads/1/3/1/4/131483488/wutuzelofamuf.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/1/0429/2182/0313/files/c._s._lewis_miracles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8410/2297/files/articulos_sobre_caries_dental.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4520/7714/files/bookkeeping_and_accounting_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6044/3813/files/sejarah_peradilan_agama_di_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6778/4864/files/98062868263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/53719301200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1692/0994/files/24291528684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3051/1779/files/jukezojomezedosipuvezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3385/4101/files/nadujorumebipusimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/geligup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/ikea_pax_assembly_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2599/5688/files/german_alphabet_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0923/5355/files/voxujawiza.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_off000079c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C2 5124 bytes
SHA-256: f208d9be894cb7e4346d328a173a351e6fa073193973967fe584340abd6a2327
font_01_sfnt_off00008b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B49 10192 bytes
SHA-256: ce11a51c48b87ba3e37e68064b4f3984e612a4468762f7ee6ae660ab4a4f61f5

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