Malicious PDF — malware analysis report

Static analysis result for SHA-256 815266b9ee104b7d…

MALICIOUS

PDF

41.2 KB Created: 2020-08-20 22:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 25976af9048519c629e833f36c1eefa5 SHA-1: ba4a3bf7ba10b1b16fcd05ee30e22b8e1b9bd153 SHA-256: 815266b9ee104b7dd793f5c90cc8cc9a35499c10eddaada10339085ebc1649b4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body and heuristics suggest a link farm designed to drive traffic to SEO-optimized content, which in turn likely leads to malicious sites. While no scripts were directly extracted, the PDF structure and link analysis strongly suggest an attempt to redirect users to potentially 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.com/pify?keyword=livros+sobre+apicultura+em+pdf In PDF document text
    • http://xamokep.mileandathird.com/uploads/1/3/2/6/132682859/87d898b8.pdfIn PDF document text
    • http://dokupes.terrieiner.com/uploads/1/3/0/8/130814328/zegusekeku.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/1/0449/8276/3679/files/sixusaremikejonovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3977/6159/files/collins_cambridge_checkpoint_english_workbook_7_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0184/6688/files/810570273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6550/6966/files/central_transport_bath_pa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7883/5606/files/kirchhoff_s_law_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/brackets_editor_portable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/25590431420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5549/6866/files/sijemasoxipuwek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/bepubapuxuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5209/5898/files/xewafiwizomus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/google_chrome_mi_nht_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/2075/0745/files/mysql_show_foreign_keys.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_off00005e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E76 5440 bytes
SHA-256: 4e7d6d088f870c8b87052276a6ee43c51bbe7560dd7253b88aa1fd1b7dde4d02
font_01_sfnt_off000070e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E4 13528 bytes
SHA-256: e6e889b3aa0ba67e1a8ae1f48b9bec7b83e18606c22b9d5d32dd67b8f3ad9fd0

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