Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbfb1a4d194f1c66…

MALICIOUS

PDF

38.0 KB Created: 2020-09-12 21:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 430f33a6a14bc00cc5e75962b1775d16 SHA-1: 3ad1458773744e5207102bdf1c97627978ec89a7 SHA-256: cbfb1a4d194f1c66dc02dbfac04856ed044f8cce36f7fb639b8c469d893c0b1a
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with several pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate that the document is designed to host a large number of external links, likely for SEO poisoning or to distribute malicious content. The presence of a redirector URL suggests an attempt to obscure the final malicious destination. 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.me/pify?keyword=sharp+aquos+lc-65le654u+manual In PDF document text
    • http://files.kaylaschmidt.com/uploads/1/3/0/7/130739093/ruravotodafuvo.pdfIn PDF document text
    • http://files.vailvalleybaptistchurch.org/uploads/1/3/0/7/130776779/lamobuzonuxi.pdfIn PDF document text
    • http://files.childsafechildproofing.com/uploads/1/3/1/3/131380337/5633925.pdfIn PDF document text
    • http://jovetoj.townofolathe.org/uploads/1/3/0/7/130738755/23e6715.pdfIn PDF document text
    • http://fegusub.atouch-ofhealing.com/uploads/1/3/0/8/130813747/3969375.pdfIn PDF document text
    • http://siraroge.rice-military.org/uploads/1/3/1/3/131379379/mewofu.pdfIn PDF document text
    • http://files.chambersinsurance.org/uploads/1/3/0/7/130738978/4670017.pdfIn PDF document text
    • http://ganaz.procreditsol.com/uploads/1/3/1/3/131398560/wanisegudisu-kopakig.pdfIn PDF document text
    • http://vaxajun.trulymedium.com/uploads/1/3/2/3/132302921/7325384.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/1/0456/9143/7215/files/purpose_of_a_template_strand.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1232/5285/files/fuxim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5232/5272/files/99368521327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7361/7576/files/godzilla_king_of_the_monsters_2019_f.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9085/3534/files/brother_printer_not_printing.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a43ec6_d228fc303ac14a95ae8acce8ddc3370a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/66c878_a5132516097d4dee8f627e11a5a9b896.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_off00004f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F42 5800 bytes
SHA-256: e2729a097aeed3ee06aed57bcff29a000a5443bf4fd90a27324b3d596c99e23f
font_01_sfnt_off000062ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EA 12688 bytes
SHA-256: ebc25fa3ade188e980978e56718ab1632f143b8c1b30adaacde8a7f4aebffa17

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