Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aad4ba80e01ab77…

MALICIOUS

PDF

41.3 KB Created: 2020-11-01 06:04:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-18
MD5: 1022d4edf48cf79cdddbde33242f4b20 SHA-1: 65ccb8d125ce36b35f552d99bccf41b6a1cc83f1 SHA-256: 8aad4ba80e01ab77bf945818a83785d0e6d55201f4041a5475b98e27388b9549
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.me/123?keyword=arizona+black+rattlesnake+price In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413240/normal_5f96f4022623e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_5f9e1d77b4b06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5f9239d534969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388162/normal_5f9214adc9c77.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/97bfb6ab-c1ee-440d-8a0a-10f8ba3e6c63/93191055293.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/6018793152.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/audrey_mack_net_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/37968014871.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/71272288855.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/legends_of_legaia_walkthrough.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/zisil.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/the_non_designers_design_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0029/8144/files/debibes.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_off00006421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6421 5168 bytes
SHA-256: 0eff09e58c79e94f514631fd456d942fd7d31775e5d1974982c97f7a13742a4a
font_01_sfnt_off000075c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C9 10316 bytes
SHA-256: 81f64f29004666e476fe589934d41de3e053223b47c920cd5ab1b7171924c690