Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3678d0496ffdce8…

MALICIOUS

PDF

51.7 KB Created: 2020-08-04 19:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6554ce3acbe7fb9dcd54246b0a8de72c SHA-1: 9376b70c977d2ae81658249130fe5b4ecf995e56 SHA-256: d3678d0496ffdce8ac7ec2b4434ba4f0df032861448a5ed768417a0728633aac
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf. The presence of a mass external PDF link farm suggests an attempt to manipulate search engine results or to distribute malicious content through a large number of seemingly benign documents.

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=ftir+spectroscopy+principle+pdf In PDF document text
    • http://vunegoxa.fenceposttrading.com/uploads/1/3/0/8/130874524/pegexa-ribewowomezas-jezademalowi-gupidulanab.pdfIn PDF document text
    • http://files.childemotionregulationlab.org/uploads/1/3/1/3/131384604/2940405.pdfIn PDF document text
    • http://files.michaelbarryanderson.com/uploads/1/3/1/8/131857758/rejaruzaxofegadeti.pdfIn PDF document text
    • http://files.hayfieldsecondarychoirs.com/uploads/1/3/1/3/131379280/46438b30b.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/1/0434/3631/0693/files/63468944900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/74088787212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/pimefunulefutasoditarana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0792/5664/files/battleships_python_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8806/0321/files/destiny_ddos_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8938/5888/files/champions_return_to_arms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/58498815454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/27885018676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/25222706469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/fetorupobotoridukewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5374/3270/files/urc-_8820-_cisco.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/makemupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3171/4199/files/33935409211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/puvup.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_off00008ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA4 4996 bytes
SHA-256: 268d1d2071fb9a6f17cef081f3a8d359dd149d6789c7c639c2ba352fc8a1acdd
font_01_sfnt_off00009dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC2 10496 bytes
SHA-256: e08fe0ede95eff33f2e28b0957b9f2c944f705929e2ce2027970a7f48e7e5cd9

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