Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc3ecdd25ae26ad…

MALICIOUS

PDF

44.6 KB Created: 2020-10-29 23:15:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 9921362c004e0a589a00cda4b5738ef8 SHA-1: 3ef691c3cc0273185fd2a4627065b7d2e887daae SHA-256: 4dc3ecdd25ae26adb56d16d0bc9cef89d02eb7338bbcd37d30d591fd717d70b3
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=pokemon+go+ex+raid+boss+list+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369773/normal_5f8baf7c41ac2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407057/normal_5f95b4dd00978.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006cf5.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006cf5.bin)
    • https://uploads.strikinglycdn.com/files/cb4a95cd-e5f6-48ea-b063-ea15b58746e1/88077628731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/6907/7191/files/google_play_services_apk_application_not_installed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8600/2359/files/demafomuveja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1800/1825/files/bosch_maxx_washing_machine_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0830/0480/files/rimeganumuzovuwalosedifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6542/4021/files/geviparu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6897/1421/files/97903678529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9060/0355/files/zovurop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfc4a254-114d-41f8-897d-0cfa3d37ac21/3472963766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0074/8989/files/43742517506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7125/0333/files/17976624697.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_off00006cf5.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF5 5900 bytes
SHA-256: f672cb7425a3f8ab3bea76d55edd2ad25ccdf3624b934a82da75b02654e19436
font_01_sfnt_off000080f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F6 10720 bytes
SHA-256: 130c965878eed807e246446b35bfafd10d4f7917fa21685c1db4e08ea5e99944