Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c11bb532317e304…

MALICIOUS

PDF

43.0 KB Created: 2020-08-13 17:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99f1e2660cd6692e9759b50f04535cd7 SHA-1: 610eaf3db4ff7e9d56d1d25ac235e2bbd79507b4 SHA-256: 2c11bb532317e3041a191c3226154fe5b1172c3e735ae60792bd9c717f727379
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or content distribution network for malicious files. The ML classifier strongly supports the malicious verdict. The primary malicious IOC is the redirector URL.

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.com/wb?keyword=basic%20rules%20and%20regulations%20of%20athletics%20pdf In PDF document text
    • http://files.jasonfranklin55.com/uploads/1/3/1/6/131636781/tekekasalepika-kubizadeze-risawit.pdfIn PDF document text
    • http://xofatigix.delloewenthalphotography.com/uploads/1/3/0/7/130775320/1995710.pdfIn PDF document text
    • http://files.tangns.ie/uploads/1/3/1/8/131871484/pemelinikolevebinuba.pdfIn PDF document text
    • http://zuminup.michellelashier.com/uploads/1/3/1/4/131453247/6099aa04cc5d7.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/1/0429/3417/3859/files/aviones_de_papel_libro_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/69805997688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/6142/2753/files/81537837705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0486/0328/files/dd_national_live.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/cylindrical_equal_area_projection.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/imran_khan_youth_loan_scheme_2020_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2009/0535/files/zasodaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/81992699857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3602/4737/files/the_doors_of_stone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4702/4805/files/vomoral.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/jujuwewak.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_off000069b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B3 5468 bytes
SHA-256: f561347ce06aa9ee27cfb09fc8a81e36d9a0a32ced07d7d48626e6959368a41f
font_01_sfnt_off00007c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3C 10148 bytes
SHA-256: d3460bdb4e746cd30425d1b5d78aa329affd7c31ef372bf1f99d916a7361fa25

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