Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dadfce11c26a8a0…

MALICIOUS

PDF

60.3 KB Created: 2020-08-29 23:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 73db8d9288c8fdd4679feaa8459a3943 SHA-1: 02e0a06293f82fd5ffd561fb3bdf13ff946db8aa SHA-256: 1dadfce11c26a8a0d46c08da9600de921e98af7dd2569d9df926393f3ddcc4f3
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of external links, a technique often used for SEO farms or to redirect users to malicious content. One of the embedded URLs, 'https://ttraff.com/wix?keyword=estudiantes+del+islam+crucigrama', is flagged as a known malicious redirector. The document body itself is heavily obfuscated and contains the same URL, suggesting it's the primary lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/wix?keyword=estudiantes+del+islam+crucigrama In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/f515ca_b035a855a60c4eea9fa2dadb6e19bec8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f4de5e_45049416c49d40cbaaf81bbcefe35ccb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e6996b0aeb414ba187fda129a4b369d5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_bb182faf500d43258938161b721e2c6e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/17940976849.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/babepegiveze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1705/1039/files/gregorian_calendar_2020.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cf14a4_49ea903992a14f15b9df2a506e039ef0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_0509c4930e4f42fbb07dcd56a78f5ac6.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_off0000958c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x958C 5216 bytes
SHA-256: 35c0dbd89288dc233d4429e44c23485d7dea08805fb52fd0520ea69ad39dae63
font_01_sfnt_off0000a725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA725 11692 bytes
SHA-256: 18e0a6a9382641f8f8c02cb85aac13849f585eb891a2eb0a50b5aedf03331224
font_02_sfnt_off0000cd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD65 16164 bytes
SHA-256: 967d89e51290aceb8fea09c2f9e0c707663cecf1a9b826b2128538f448fdbc28

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