Malicious PDF — malware analysis report

Static analysis result for SHA-256 2915841d7926950f…

MALICIOUS

PDF

45.0 KB Created: 2020-10-21 01:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 20c6181b909bafcf62fea4e3e8d206d3 SHA-1: 60f20fddc6cb02a0053dc5bcb0a2b0295790ba21 SHA-256: 2915841d7926950fdfd8e15e837b52adae0929c65b0266c4e89da791a6d63024
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/123?keyword=kenya+civil+servants+salary+scales+2020+pdf In PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/lapikavefiwat_tewuzadobesu_renog_wigoba.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/valipuku-pinimaja-votipebap-falevutu.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/devuxupujikeninaferi.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/7727616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_5f8e5dfa99290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5f89404e53b48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f8f5bd22eb76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378606/normal_5f8ce74769331.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/1/0436/4189/7113/files/96722398965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0524/6112/files/48817813385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/5769/3091/files/nezomipurenukike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3897/3345/files/93217056467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7350/1884/files/torani_coffee_syrup_sugar_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/166c48e0-96f8-406f-9cd6-840fab35a67e/vezoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e2cc4a6-34b9-4a33-8bdb-e84fb81b5c73/vaputat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d47f32-5751-41eb-9c14-4596ed697c5b/jadowokijutikaromivifogun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33f56cc2-5382-475f-9071-2e93f7ff3287/87510444976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2647/9769/files/billy_joel_my_life_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3953/0389/files/tumivojodurifanidek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6285/3283/files/quotes_from_beowolf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5175f40-a192-4157-98aa-9934cbef778c/walakulefate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd274b99-d33d-4807-b483-42c0846c4d87/pumabidob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4460d831-c49e-4b83-b559-dead3a3a0b8f/lectores_en_red_secundaria_respuesta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22066324-a8de-4cd4-bd48-004329848d59/27555809988.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_off000068d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D5 5556 bytes
SHA-256: 99d8ace8c284d22dc26fa00f52f270e83b6c5c3996ca4366d9b4ba7887186f55
font_01_sfnt_off00007bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD8 13612 bytes
SHA-256: 20cf72a8389ea8a793d3fb2cbe85984e87770c59fbe5aea55dac52569a1186a9