Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c80209a83966f18…

MALICIOUS

PDF

51.3 KB Created: 2020-07-28 22:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb4a390b31497faf249573b2fff4565f SHA-1: f37bb6a295d3ebb05d4f8fd1d865a9da0a85e49a SHA-256: 5c80209a83966f184c76137bac4edfc5a75bd0f6b2b78e7d89d51c60e696749b
194 Risk Score

Malware Insights

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

The PDF contains multiple links to a redirector service, which in turn points to a large number of PDFs hosted on Shopify. This indicates a link farm or SEO manipulation tactic to drive traffic. The ML classifier strongly flagged this PDF as malicious, and heuristics confirm it links to known malicious redirector infrastructure. No scripts were extracted, but the primary attack pattern is the distribution of malicious links within the document.

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=carlos+castaneda+pdf+gratis In PDF document text
    • http://files.northwellingtonanimalhospital.com/uploads/1/3/1/3/131381480/mubatuxunavuvotora.pdfIn PDF document text
    • http://files.mnjeweler.com/uploads/1/3/1/4/131437740/fomurogoxufirofaliz.pdfIn PDF document text
    • http://files.thebrewnextdoor.com/uploads/1/3/1/8/131856108/wibesenov_ruduzizuvupo_wotubirujirixu_mexozajuzuw.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/1/0427/4959/1718/files/59520763498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2585/8711/files/55626473265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/bukorisozot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/62132734505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2281/0268/files/47323225061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/jatedonidogasebufowoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/51552519851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/91557231786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1595/4847/files/memivadumerufepukozit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/15790028075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0401/0389/files/2577340270.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_off00008c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C63 5132 bytes
SHA-256: a7e47ca265da23b2484534ba8a0127f02ab7ab0330da86f818205a4aa972d7f2
font_01_sfnt_off00009de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE7 10000 bytes
SHA-256: 73562beb2902835fdb1f2b8f8488d2bd06d30fad9469d1792b5f4a0480fa5948

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