Malicious PDF — malware analysis report

Static analysis result for SHA-256 839ced1707bca74a…

MALICIOUS

PDF

43.5 KB Created: 2020-08-10 10:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c64d185222f2e1b36837c698d1b5aa2c SHA-1: e8c10359460974fe5cc73581ee2e27b393caff10 SHA-256: 839ced1707bca74a279ecd2f09de66ba09e8f5c82773905253954f9789845d2c
194 Risk Score

Malware Insights

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

This PDF document contains numerous links to external PDFs, many of which are hosted on SEO-optimized domains and redirect to malicious infrastructure. The primary redirector URL is identified as malicious, suggesting a phishing or scam campaign. Although no scripts were extracted, the PDF structure and embedded links strongly indicate an attempt to redirect the user to a malicious site, likely for credential harvesting or malware distribution.

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.ru/pify?keyword=physics+formula+sheet+pdf In PDF document text
    • http://files.mroodwebsite.org/uploads/1/3/1/3/131384121/mojuboros-nalivubofalasex.pdfIn PDF document text
    • http://files.jollyduke.com/uploads/1/3/0/7/130775205/6244228.pdfIn PDF document text
    • http://gifafev.kellytuckercreates.com/uploads/1/3/2/8/132814930/3852318.pdfIn PDF document text
    • http://files.stevenjayclarke.com/uploads/1/3/1/4/131406826/6c658cc941158c8.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/1/0429/0406/0071/files/smallest_reader_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/irritable_bowel_syndrome_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3749/1357/files/fiboduzapajorafedifuxef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7539/4977/files/51973434506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9286/9281/files/sakodof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/8083/1396/files/57640741379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/xelexuwimovidujuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9380/2662/files/calculus_a_complete_course_robert_adams.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/farefemukepinakovidozil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/58718067505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9090/2166/files/giwuruwugekabune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2305/6545/files/high_school_english_grammar_book.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 7

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_off00006bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF1 5496 bytes
SHA-256: 9b5bcbf70518ba561eeca532eda31d12bbe43a59814636f8bd3b8cbb65a5c26c
font_01_sfnt_off00007e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E82 10124 bytes
SHA-256: e54c12502979f36b4443fae9d1b88b4cf32774f3681a2fbe91e3f34eddf82669

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