Malicious PDF — malware analysis report

Static analysis result for SHA-256 e966040d8a74eaa8…

MALICIOUS

PDF

42.8 KB Created: 2020-11-01 03:39:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 7ce462d30c6b6ae1a83e6ae9cf90051d SHA-1: 98a0bb348369847b9cf71b5304be2eca26283582 SHA-256: e966040d8a74eaa84ee9b6c786c38e11eab49bc245771ada937ca66867139ad7
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.cc/123?keyword=bally+total+fitness+membership In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f8933b4c3e6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374177/normal_5f96481a2ea55.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e35a7e-4c08-4ccb-b0ac-fbbc3d73e1dc/john_steinbeck_biography_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5721/5166/files/18259575641.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/nenusorosewis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fbdec8c-7891-473c-88db-e550e3252588/13930806775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9097/6162/files/zojonezotinunasop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65bc8a82-32c4-403e-a99b-2b9a0028f527/biointeractive_lizard_evolution_virtual_lab_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e8f8e4a-a19e-4827-a6ce-e4494d58fba7/78463201327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac9b765d-df05-422b-a959-e8baa0067e4b/47142154818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3220/5722/files/cccam_cfg_maker_apk.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_off00006851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6851 5432 bytes
SHA-256: ab7715e7e99f07f469744178e5fd49f64355db203b56c777155eb6c843cc6ce6
font_01_sfnt_off00007aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA6 10568 bytes
SHA-256: d822260af4f152b26e8147843e9207970053ccf3d88c4e9cbcab324a0d55b7ef