Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c3b7dbdb935353…

MALICIOUS

PDF

42.2 KB Created: 2020-08-12 08:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 11af990c71cfc12e51d4a10279471582 SHA-1: a98294be91104d1d855d8a17301c026faf177409 SHA-256: b6c3b7dbdb9353532fad364c63965e1494a18a07b297497d756e29a77fbf17cc
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.ru. This indicates the document is designed to lure users to malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous links suggests a phishing or malware distribution attempt.

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/wb?keyword=pastoral%20americana%20philip%20roth%20pdf In PDF document text
    • http://files.vanvliet-kassenbouw.nl/uploads/1/3/1/4/131406442/9373049.pdfIn PDF document text
    • http://files.verdictomaha.com/uploads/1/3/2/8/132815220/50efcc9051b.pdfIn PDF document text
    • http://demaror.rebeccacroftstudios.com/uploads/1/3/0/8/130813528/194473c.pdfIn PDF document text
    • http://zuzexi.barry3d.com/uploads/1/3/0/8/130814328/jiseguluduzokoma.pdfIn PDF document text
    • http://xusuzuf.dirtybootsproject.com/uploads/1/3/0/7/130738647/neduxew.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/1/0431/7118/4794/files/sevajejitipej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/75220461635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/falomovulekuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4509/7365/files/prentice_hall_algebra_1_practice_and_problem_solving_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3167/4535/files/nutonekomojegogexoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1570/8577/files/gipaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2669/3789/files/23433996649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3871/6583/files/abnormal_ecg_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9353/9478/files/zojigokutoxid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/71407113869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/vimerofeduvizizifaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/45070858520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/saxezadasusogavatedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/detelipusirototogotegazi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6681 5396 bytes
SHA-256: f12363aeef30261b6b4251d20d9bb4e1c574c48adc4a58c9770c3711256e315d
font_01_sfnt_off000078a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A7 10304 bytes
SHA-256: 8e16df532824a58e0264b67ca926b04d89a89f7f26d3bae1248bfb24020b2eb3