Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ab30d60be7a19a…

MALICIOUS

PDF

43.4 KB Created: 2020-08-27 18:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3e1014f5e1fb5ed5dd403dba82ddc3bd SHA-1: b396fcc9ebd22a0d4722cfd4d87ab74614cbd413 SHA-256: 97ab30d60be7a19ae8f8ed123f4297f7d0aaa4d4eeef34e7412bea9eeddd76eb
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.club/pify?keyword=estructura+de+los+pavimentos In PDF document text
    • http://files.chasehillschool.com/uploads/1/3/1/4/131454102/8d8a957c201718.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/1/0427/9471/3244/files/63272827646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7689/3334/files/latex_in_jupyter_notebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/84375867123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6778/4864/files/vabosokokirosoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/framed_ink_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7086/2998/files/10385357069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/sunabetovukipukuzezite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/aditivos_quimicos_em_alimentos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/91642078575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2274/3709/files/anthropology_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/xatijodagawimekaxesusifen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5580/7641/files/solange_gomes_livro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0912/0152/files/40684084478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7273/1801/files/61871656539.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_off000067cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67CC 5236 bytes
SHA-256: 46b5c11710e3e313beffe95886ff68a1561f652a4db565f945d17384c97eea54
font_01_sfnt_off00007984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7984 11480 bytes
SHA-256: 92a97344384355ead914589634ee957e628c7599244f48c58bc2560d952f9ae5

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