Malicious PDF — malware analysis report

Static analysis result for SHA-256 8220419404bfacb9…

MALICIOUS

PDF

47.6 KB Created: 2020-07-30 09:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 648a7bf06104e6b7200ec4074b65897b SHA-1: 3e8c58c52e43f825e6ea1ea11e472865b70e3a2c SHA-256: 8220419404bfacb9a24309c30b788956a8c4f74103fce81391d0f3daa14978aa
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is part of a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' rules. The primary redirector URL is https://ttraff.ru/pify?keyword=impacto+de+las+reformas+borbonicas+pdf, which is used in conjunction with SEO-optimized PDF links hosted on various platforms. The ML classifier also strongly flagged this PDF as malicious.

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=impacto+de+las+reformas+borbonicas+pdf In PDF document text
    • http://files.allycole.com/uploads/1/3/0/7/130739379/mukuxafelewabaj.pdfIn PDF document text
    • http://files.sergeseiden.com/uploads/1/3/2/6/132683135/nixenarapoku.pdfIn PDF document text
    • http://files.sikkimdiscovery.com/uploads/1/3/1/3/131384468/4892416.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/1/0433/9050/1020/files/lejagamelozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4293/0842/files/vevizefobakilojejune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7895/8758/files/17912846976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/7228117665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/63974127275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/joxevikakedudokanodimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/85186392749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/48784707173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/74218920777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/rusubelukifevejafimexeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0757/3157/files/26260716896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3714/5753/files/90944831531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4233/9992/files/21624475401.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 6

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_off00007ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC0 5168 bytes
SHA-256: ba64706348d022034b5ebc51b1d3e3856b54bc057d6ce620de5bcb0d00c88b27
font_01_sfnt_off00008c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C20 10824 bytes
SHA-256: c6a0b17cd2116a55fb86d6c69f711e543201ada76ff6d449311b0199712508ec

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