Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d3831930dc5d123…

MALICIOUS

PDF

43.7 KB Created: 2020-08-05 09:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8b4409986fecd2f590eaf1ac420a09af SHA-1: c37fa906beda72b4a2840ec821945c94f6823314 SHA-256: 6d3831930dc5d1235311970038652cd8a7dd3b9895055f15fe15606066950046
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external PDFs, many of which are hosted on Shopify and appear to be part of a link farm designed to improve search engine rankings. One prominent link, 'https://ttraff.cc/pify?keyword=30+days+to+improve+your+vocabulary+pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to potentially malicious sites under the guise of offering free PDF downloads.

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=30+days+to+improve+your+vocabulary+pdf In PDF document text
    • http://files.traduccionescreativas.com/uploads/1/3/1/4/131453712/gozojakar.pdfIn PDF document text
    • http://files.jjjohnsonauthor.com/uploads/1/3/1/4/131437268/lotoxaboxubuw.pdfIn PDF document text
    • http://xotura.teakslockservice.com/uploads/1/3/2/7/132740435/wezinemaniwume.pdfIn PDF document text
    • http://dopesu.jamespatrickcronin.com/uploads/1/3/0/8/130814229/wawibodigenidipetoze.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/1/0432/2285/9944/files/68156827652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/2763774490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/82330570728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3777/5256/files/tudakibedubux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/7743984453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/97182769569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3777/6289/files/basic_computer_course_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sarexomerowomowubufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7620/6238/files/julaxomome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7405/0458/files/66951475418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/tiwefusonibenexesuvaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/80469770294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/pejaxoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5850/3573/files/71342476179.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_off00006af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF5 5812 bytes
SHA-256: 355e13f28b420ce3a5e0118dedb86de36c022407aa46508a2f1f89ed825bd2db
font_01_sfnt_off00007eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAC 10276 bytes
SHA-256: ed600d2171914894179a5a6f7ac0e6634a1d8b95a3093c38825ff83cec908708

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