Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d4bf2e8310bdb36…

MALICIOUS

PDF

43.9 KB Created: 2020-08-09 07:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1e505ab7b7890179ef6ad49a6a1ca811 SHA-1: 894cdd1695d0ebd6fad044649cf8471371fb889d SHA-256: 3d4bf2e8310bdb3676f4d61862c509ca2a4592629246d822a6dc31d86548b14a
194 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and a large number of other URLs pointing to PDF files hosted on various domains, suggesting a link farm or redirection strategy. The primary attack pattern appears to be the distribution of malicious links disguised within a PDF document.

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=howard+french+everything+under+the+heavens+pdf In PDF document text
    • http://files.kquattrin.com/uploads/1/3/2/7/132712163/578642.pdfIn PDF document text
    • http://files.internationalfishers.com/uploads/1/3/1/1/131163705/wedigikusitukuxovaj.pdfIn PDF document text
    • http://guvuk.clarinetinstitute.com/uploads/1/3/0/7/130776485/2810535.pdfIn PDF document text
    • http://zalero.biolutionresources.com/uploads/1/3/0/7/130776031/9535657.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/1/0430/8451/3429/files/17250608605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zekimopesafirizaxos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/believe_in_yourself_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1137/9097/files/spelling_bee_words_for_grade_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/kakataxun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84005007378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7654/9798/files/15924714326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1067/9203/files/costiera_amalfitana_mappa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1172/6750/files/luwok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/rovibuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6976/3747/files/99233584569.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 4

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_off00006bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC8 5600 bytes
SHA-256: ff3ebd65cd8c6bbfb55d3d07d8e00bbc7eafc074c8f79e3fd8bd5fa46bc2b464
font_01_sfnt_off00007ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF4 10320 bytes
SHA-256: 88408ca3cba1903a286bbd2dd571f52de70e8ed217c683d13b9ab76e73035ecc

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