Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3efd53533499c8b…

MALICIOUS

PDF

54.4 KB Created: 2020-08-10 04:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7fccfbfa37475593bd5045d2f3888b47 SHA-1: c08e2b6d62a0ec41d99d65cf08a8ec563bc5f122 SHA-256: d3efd53533499c8b6dbe3bcbad24c94e00569429ed4a2da91328d86e7da21e88
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, characteristic of a link farm used for SEO poisoning or to distribute malicious content. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=aprendizagem+motora+de+discrimina%25C3%25A7%25C3%25A3o+e+verbal+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure.

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=aprendizagem+motora+de+discrimina%25C3%25A7%25C3%25A3o+e+verbal+pdf In PDF document text
    • http://files.magisktgott.org/uploads/1/3/0/9/130969938/56ce40296c.pdfIn PDF document text
    • http://files.patersonsland.co.uk/uploads/1/3/1/4/131407135/kozulazobori-vemijamepexafor-seriwewadotavu.pdfIn PDF document text
    • http://files.cobusinessadvisors.com/uploads/1/3/2/8/132816096/5578153.pdfIn PDF document text
    • http://files.marvinsnider.com/uploads/1/3/0/7/130739174/fatewor-naxeloke-kaguv.pdfIn PDF document text
    • http://files.smartstartdriving.ca/uploads/1/3/0/8/130814408/6543536.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/1/0433/6022/3382/files/tales_of_vesperia_estelle_artes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2602/9463/files/ditexul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5448/2079/files/29003989680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/36885155988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6267/3054/files/wozovorajiwuwuwatobazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/basic_probability_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/wondershare_editor_pro_mac_serial_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9997/9930/files/wutelekatumulapugiwed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fofigez.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 8

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_off0000838f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x838F 6212 bytes
SHA-256: 46fb8e834b4cb37c4aa7365641803b09903d40908a8ebc391ed93ace570a271b
font_01_sfnt_off000097d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97D6 16672 bytes
SHA-256: 65433b84ca922ed23ff41f5654a0679b302b5460e7aa1992239a85e3b8f29863

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