Malicious PDF — malware analysis report

Static analysis result for SHA-256 c335148a182a585f…

MALICIOUS

PDF

45.9 KB Created: 2020-10-25 10:09:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: de8844c27edfd819bd164e66bff30e87 SHA-1: 75ec757be439c1719ba2537620bf98ba7e6a0ed5 SHA-256: c335148a182a585f654543265c2d13899c0d1051c9fd7fa5495d8d6f4e3403b6
194 Risk Score

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.link/aws?keyword=acceptance+prayer+pdf In PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/rotofugi.pdfIn PDF document text
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/disibub-nosibevile.pdfIn PDF document text
    • https://nazivuwe.weebly.com/uploads/1/3/4/4/134452961/8a04f599.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f8738fd0bb9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f8a2c7a5e59e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f896b94408e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393759/normal_5f8f23f57be69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414680/normal_5f94f5ed61c7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381748/normal_5f8cc9e58ec73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387052/normal_5f8cc007cd440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_5f94754cd27e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f877003cf4a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378405/normal_5f8c680b0e298.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007410.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007410.bin)
    • https://cdn.shopify.com/s/files/1/0429/3741/7887/files/easton_arrow_weight_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9287/6705/files/weights_and_measures_act_1976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6078/0443/files/lol_nidalee_jg_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5a3fab9-f05a-44bc-923f-3de2dbb9f981/constitucion_de_1795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3452fac9-a50e-4228-ad87-722f9a2cd26c/isa_s5._1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b9cde1-9f49-4ed8-bdec-c9e555acb299/7371107312.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 extracted file (font_00_sfnt_off00007410.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7410 5028 bytes
SHA-256: 933803eb1c3410ac9981cd456186e6b0c0f52000ff582a8d3f3b29b6c1bdf21b
font_01_sfnt_off0000854a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x854A 11220 bytes
SHA-256: e92ca93af475179330889a9bcbbb6b34154a086da28088d8af1f44d64594ea5a