Malicious PDF — malware analysis report

Static analysis result for SHA-256 8428fbed55e645ef…

MALICIOUS

PDF

43.1 KB Created: 2020-08-07 20:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9cd23d19aa32fc15dc8f6855ff1293f3 SHA-1: aaa4d47b922e9a5a762bb61e4476c280d211cc05 SHA-256: 8428fbed55e645ef37e147bf38c9f4a563cec326b7af33a5bd975ee47dd4ffa5
194 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to a redirector URL that masquerades as a free download for "icao annex 17 pdf". The redirector then leads to a large number of other PDF files hosted on various domains, likely as part of an SEO poisoning or phishing campaign. The embedded links and the overall structure strongly suggest an attempt to lure users into downloading potentially malicious 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.ru/pify?keyword=icao+annex+17+pdf+free+download In PDF document text
    • http://files.sbkherbals.com/uploads/1/3/0/8/130815026/nuburavizanib.pdfIn PDF document text
    • http://files.newellbooks.com/uploads/1/3/0/8/130813797/vapujulo_rajeker_vewidufe.pdfIn PDF document text
    • http://mixubize.petphetish.com/uploads/1/3/0/8/130874359/fewajatotavisiz_vemew_zerevutikok_pukoduxowijof.pdfIn PDF document text
    • http://files.janenicola.com/uploads/1/3/1/3/131380183/755797.pdfIn PDF document text
    • http://files.birdsofpreytexas.org/uploads/1/3/1/4/131438397/1f28c8.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/1/0432/0506/6913/files/lemexalulubepomibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/subuxaxemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0688/5031/files/xabakakoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4826/files/61032876258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4188/1254/files/jilabujutolaxirogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/nalorop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/pemufagofanixefenanezav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4570/7166/files/nisuvemabotudi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4645/1862/files/6068031148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8855/7718/files/types_of_communication_with_references.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/77142304262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4330/7175/files/broken_silence_natasha_preston_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8151/2613/files/85926549368.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_off00006b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4D 5200 bytes
SHA-256: 36f0a70d4b260c148d1fe8ee7e24c1db5a24b07a5f7b4771194eddc3bd201a44
font_01_sfnt_off00007d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D38 10076 bytes
SHA-256: 15b6cc83fc3ac56494c7efbe97e73d8a7a8f07208b44257a64826513301a3651

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