Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a2400dcb2ad5bd…

MALICIOUS

PDF

38.4 KB Created: 2020-08-11 22:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 89bf129070369a3132091072c15db7fd SHA-1: fdf54ca0e1c6e0c75ede690fbae80ee56d21c438 SHA-256: c8a2400dcb2ad5bd90b265ade622a1c162697c6fc50c1b479cef60f9f764353c
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=dsm%20v%20pdf%20completo%20descargar%20gratis'. This indicates the document's primary purpose is to redirect users to potentially harmful sites. Additionally, a heuristic for a PDF link farm was triggered, with numerous external PDF links embedded, many hosted on Shopify. The document body, though heavily obfuscated, contains text related to 'Dsm v pdf completo descargar gratis', reinforcing the lure of a free download.

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/wb?keyword=dsm%20v%20pdf%20completo%20descargar%20gratis In PDF document text
    • http://files.mealsformedicine.com/uploads/1/3/0/8/130874026/9018e98aba1.pdfIn PDF document text
    • http://files.k9rehabvet.com/uploads/1/3/1/6/131606583/gatuzeluvobibejev.pdfIn PDF document text
    • http://zesibobo.drcarolineclarke.com/uploads/1/3/1/8/131857334/a39dc3f1.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/1/0431/9641/6160/files/66918568517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9028/8535/files/kirovagaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9676/8673/files/15471250552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3444/1885/files/uninstall_node._js_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/39875861127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7335/3366/files/one_line_ascii.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40573574370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1573/9304/files/jurnal_aspergillus_flavus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9227/0494/files/40616053562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3975/9255/files/crack_office_2016_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8469/3160/files/losapovapis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3826/8827/files/30568548754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.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_off00004f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5B 5532 bytes
SHA-256: d2cec17eb0bb2f47b33cd9a478d167091f8a394948834ff4dbbb3a4493149481
font_01_sfnt_off0000621e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621E 13468 bytes
SHA-256: 0180b980db8078fef359290fd75fdc5e0fe8b6b1cdd07f768a2b36a87e4d287d

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