Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b66f3783ecd75f…

MALICIOUS

PDF

42.1 KB Created: 2020-10-15 03:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d754918eedb1311176006ecd1c6d2aed SHA-1: 208a376e691853ee3ed840379a80144bfbfeb7c8 SHA-256: 08b66f3783ecd75f27d81aef7e3f7177553efbce0a33ea348629fbf03b51008d
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/pify?keyword=prueba+de+ingles+b1+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f86f9ae6d733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f872a58c3ab5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f8778da734b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f87695799e6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f877a371dc4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_5f878d8235e77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f873f58aaa30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f8731a1b9454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f8788026786a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f8756decad7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f876781806d2.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/1/0494/1185/0407/files/mounting_solutions_plus_miami_fl_33157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3784/1813/files/45672291755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1077/5464/files/sedasigon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2070/9798/files/56714230729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9da34486-3917-4041-ae1d-3005d83472a4/buremadowovatufozobeled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd62e476-dbef-4bb2-a933-479fdb5ef0b7/tuguzewifit.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_off00006435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6435 5404 bytes
SHA-256: 12564e448cc5156818047e7943d7e77a60174be174de7f22ab2dafbd6b741c13
font_01_sfnt_off0000769d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x769D 11480 bytes
SHA-256: a83c260d80e5ab83214d47659fe604f6a6728a9a309b062df0c0aa082edc1de4

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