Malicious PDF — malware analysis report

Static analysis result for SHA-256 13209ecd7ff8627c…

MALICIOUS

PDF

36.8 KB Created: 2020-08-10 16:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e36bdf57ccefd23da0df604d505c3e76 SHA-1: b41d182e94db6f15528098dbc4084f658ae8ee99 SHA-256: 13209ecd7ff8627ce9f80c47cb987df08869bec52900b2005bed4a14754c3260
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links and a prominent URL pointing to a redirector service, identified as malicious. The document body text, though partially obfuscated, includes a reference to 'Caballo de troya' (Trojan horse) and a URL that is also present in the heuristics as a malicious redirector. This indicates an attempt to direct users to malicious infrastructure, likely for phishing or malware delivery.

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.cc/pify?keyword=caballo+de+troya+6+hermon+pdf In PDF document text
    • http://files.shoptoco.com/uploads/1/3/1/3/131381706/9844125.pdfIn PDF document text
    • http://files.ttphotovideo.com/uploads/1/3/0/9/130969532/mefeg.pdfIn PDF document text
    • http://files.7kmetalworx.uk/uploads/1/3/0/7/130775969/369f9811a0.pdfIn PDF document text
    • http://wopolep.moebasketball.com/uploads/1/3/1/6/131607712/7843342.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/1/0431/8887/9521/files/pinowoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/ms_access_database_2020_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8832/1438/files/55987073798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/study_guide_for_geometry_houghton_mifflin_company.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/71929045918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/xanibudujujivetiwixadoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/80065313257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/xujelavonobibinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9159/1317/files/20527713594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19085525902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5559/5172/files/lujisotupubosafe.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_off00004d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D22 5404 bytes
SHA-256: e2af805c55696ca0edf8487631559b25bccc3c7ffbb4d05e3f2d8882d9036507
font_01_sfnt_off00005f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F60 11512 bytes
SHA-256: dfdd1817dc1a3785d613d6753891a0f6ad79a80e29f37e81e809792ff68b8639

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