Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f282c69fb36ecf5…

MALICIOUS

PDF

43.0 KB Created: 2020-08-28 11:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 80ae553d8787520a461042868862c43c SHA-1: 665a9c9d7211ac351521d2ac6ad77636dd5e704b SHA-256: 8f282c69fb36ecf57788ee3e5186987f2219e795bab30e1e90a7ff6eef240f6a
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=best+hiit+running+workout+for+fat+lo In PDF document text
    • http://jenikapov.thisauthentichome.com/uploads/1/3/2/6/132682076/simus.pdfIn PDF document text
    • http://nepogefa.flowyogagalway.com/uploads/1/3/0/7/130738850/juzirepeder-gefiba.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/1/0431/1239/9010/files/vosik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3173/2119/files/success_with_reading_comprehension_grade_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2209/7304/files/mugin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9952/9120/files/16875743991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6224/7067/files/pikofujugojuzidanop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/93577533514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/lasofutafatiwit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/nextbook_ares_8_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9499/0231/files/classified_balance_sheet_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1860/0095/files/bubifojimavalimevogelelul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8832/1437/files/20376592862.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_off00006a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A29 5232 bytes
SHA-256: cdef29a3c660c79031035f74593bd35980910790f8647aebb5c01d633253d1af
font_01_sfnt_off00007c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C05 10268 bytes
SHA-256: 2958003e6be2f82ce1bbaed17ce330967735240f32c32287ac14c50d710a3f1c

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