Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d2409285e26f819…

MALICIOUS

PDF

52.4 KB Created: 2020-08-03 16:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1869e022a03e9782427d7c345c5e422b SHA-1: 53c1bb1ba36f6aa2ce1dd871b27e5e0051b3499a SHA-256: 4d2409285e26f819cbedab3e8e8d63256e2f61a91d98fa9f9d6575a777ff0ea1
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=enlaces+quimicos+bachillerato+pdf', which is flagged as a malicious redirector. The PDF_SEO_LINK_FARM heuristic indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host further 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=enlaces+quimicos+bachillerato+pdf In PDF document text
    • http://files.mallahdivinemallah.com/uploads/1/3/1/4/131437418/losavakivize.pdfIn PDF document text
    • http://modiru.hansaone.com/uploads/1/3/0/8/130813747/zenudasarido.pdfIn PDF document text
    • http://files.angusskiclub.com/uploads/1/3/0/7/130739949/d9cdf51bd23c465.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/1/0429/1490/6279/files/nizap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8658/5764/files/92755871110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/66880478842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/52704707389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/54351262275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8503/6708/files/dasiworotutin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8499/5991/files/febenemudepumevitosubobov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9581/7382/files/lukeroxoposojuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1675/7153/files/xasovet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0205/1235/files/87610528353.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000733e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x733E 5620 bytes
SHA-256: 27e4ad5affd5d1b946969b90af8399d072aee42001444a82372c2562573775d1
font_01_sfnt_off00008624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8624 12048 bytes
SHA-256: 14135cbded86ef72904bd3f9b8485b61ea530661dba583673dc87eea9c83884e
font_02_sfnt_off0000ad2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD2E 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939

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