Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d3877704aa5eb93…

MALICIOUS

PDF

43.2 KB Created: 2020-08-15 18:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2d7ede95a652e42156cef9cf728bd977 SHA-1: 939eb1638d2a184f80490a3dd3b0529a5b18661e SHA-256: 7d3877704aa5eb9356fb3b210dd126a759eb720a24026990ea7fa55837d58cf1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or phishing attempt. The primary malicious URL, 'https://ttraff.cc/wb?keyword=conditionals%20esl%20worksheets%20pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, likely intended to appear as legitimate resources. The ML classifier strongly indicates maliciousness.

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=conditionals%20esl%20worksheets%20pdf In PDF document text
    • http://files.portlandcommunityfund.org/uploads/1/3/1/4/131411281/wobixikogimi.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/1/0434/0537/7701/files/71250420974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4191/5042/files/create_watermark_on_document.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4357/7246/files/antonyms_words_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2531/6514/files/applied_microsoft_business_intelligence_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4765/6343/files/53263879351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/zevepode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7723/7917/files/65834075674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9988/9569/files/botusoxerojiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6485/2634/files/kosegaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7248/6564/files/84053911605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8664/2338/files/xogukudalit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3808/7070/files/biometria_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/sijupuvezapisojolakaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6654/0711/files/52597566199.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 1

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_off00006095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6095 5188 bytes
SHA-256: acb749306db0d0e9a896d1dfc0d87fff80fe7e4a7c5e5bdb556fc566a7734ed2
font_01_sfnt_off00007248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7248 14844 bytes
SHA-256: 017f588cacd86cf56b10a00f728d65bd5f965530a1f552f82197a9ba68b9b401

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