Malicious PDF — malware analysis report

Static analysis result for SHA-256 4361307f8caa4c9e…

MALICIOUS

PDF

41.1 KB Created: 2020-08-05 01:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 93246c2022a676aaf0e971a00ca41423 SHA-1: b1eca68651b01c54081872d9b33cb11e7953cb6d SHA-256: 4361307f8caa4c9ee2a08f3fdd0dcd0323235f50463cf49c15f1264c5f48b6d3
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=first+encyclopedia+of+science+usborne+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. The document also exhibits characteristics of a link farm, with numerous embedded URLs, further supporting the malicious intent.

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/pify?keyword=first+encyclopedia+of+science+usborne+pdf In PDF document text
    • http://files.erasor.org/uploads/1/3/1/4/131438073/7b41b4f798985f.pdfIn PDF document text
    • http://files.trailsidecountrystore.com/uploads/1/3/1/3/131383973/d6074dd10d8c88e.pdfIn PDF document text
    • http://files.bunkybambino.com/uploads/1/3/0/7/130775727/jimuvotoz.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/1/0431/9969/2958/files/43447077634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/lusenik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2975/6066/files/77467228546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/mefasirigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ferenap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/situmubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/62585298019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/67827309113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/28926707123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/85301061835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/86048857456.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_off00005cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDF 5348 bytes
SHA-256: a56ba1f775241d53c146a89e892bf837a19ca5f2f887700b92eef102520d3212
font_01_sfnt_off00006f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F26 13868 bytes
SHA-256: a2d0a8f71d359ed422cf7ff5a5048862d9a3aa29a77abf2aff99639f3189f377

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