Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e362d86642772a…

MALICIOUS

PDF

37.2 KB Created: 2020-10-16 11:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e8c19d6b08193c5d1c2f22a182f2850c SHA-1: 4662e8626e7fd9ff4e1453bb3ddd3b2606d2f629 SHA-256: b0e362d86642772a59dd11c6337a80ca921c3acaa2db298e9b0cb15dbe8a0afd
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=list+of+compound+nouns+a-z+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5f88bc7a24cf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f86f4cf17f24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f87f28179526.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_5f881e5acb1ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f8908f48fd24.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/6c71955787.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/sogamuvuvevupa_vatizavoxo_jeroxovixefujof_nafifuwet.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/137dbbea918.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/8ce90c66-1719-4fb7-b266-45db2adcf2fb/somasinek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f78d4ab-dc02-4b53-abe9-fb1a52f0393e/zitumaretuzaseraxawajat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9cb2d77-5edd-4040-8c4d-727bd12ab625/lulakafegumev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0963d53c-0b77-4a01-866e-59a494a985dd/28806872807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a0143da-1d04-4801-b71a-23c0c4bf33b8/9647538686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9598/0709/files/seward_park_seattle_swimming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0685/2759/files/king_street_intermediate_school.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_off000055aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55AA 5196 bytes
SHA-256: 90f3e35fc38fcc6473f9fb16f5b067cea5162f216e4a2474d2b931baa5dec505
font_01_sfnt_off00006756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6756 9548 bytes
SHA-256: 7437e21c0e484b50c0bd67bd02eb94ea14ce4059335cac19f1fbd6d3619cb9f3

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