Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7840d346f36ce0c…

MALICIOUS

PDF

44.0 KB Created: 2020-08-24 18:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99729f786b60dcb5222bee2501ecd449 SHA-1: 06ac4f34552b66d69afecd64ad01f43f73349fd8 SHA-256: d7840d346f36ce0c8e73ac26b0d4564294ec0f40952de1d46960c66c267b86ab
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to what appears to be a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.com/pify?keyword=ccna+2+chapter+8+quiz+answers', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a lure to external content. The ML classifier strongly flagged this PDF as malicious.

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=ccna+2+chapter+8+quiz+answers In PDF document text
    • http://jusuvexaz.gabrielstrumpbooks.com/uploads/1/3/2/6/132681670/nitopa.pdfIn PDF document text
    • http://files.jemskpropertyventuresinc.com/uploads/1/3/0/7/130740571/55495951a5e.pdfIn PDF document text
    • http://files.fultonmusictherapy.org/uploads/1/3/2/7/132741136/4044597.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/1/0436/5965/7374/files/batinito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6224/8095/files/ags_world_history_textbook_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8434/9591/files/euclid_mathematician_information_in_gujarati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3865/2054/files/gadewefuvovuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4092/4063/files/bose_wave_music_system_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2833/3212/files/57552270351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1119/4525/files/82329718209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/jokitapidazolimolivigiren.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1673/2315/files/3207307306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/31326838118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/99795113968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9984/6824/files/wurefomenodiv.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_off00006d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D45 5488 bytes
SHA-256: cab41fbc474aa269bb9bd62850a2fbef7215ba95da492a1977c5617882106112
font_01_sfnt_off00007ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF9 10408 bytes
SHA-256: f2f18ef82bd04622a9553219c42a138ad1da280cbe238555fc3b9d1a5fbaae77

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