Malicious PDF — malware analysis report

Static analysis result for SHA-256 b844abc6ffd59f6d…

MALICIOUS

PDF

43.2 KB Created: 2020-10-15 14:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: f4093de77cdd77dca998f2cdcc9dc290 SHA-1: ef718114706c151ca7e9ff00be79b74c36321118 SHA-256: b844abc6ffd59f6dcfef3991eac5ed0ce7c75b4d0080c1a79e1a47ff32c3e67e
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://ggtraff.ru/123?keyword=guided+buddhist+meditation+youtube In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f8787d1cd654.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f880d193f8fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f88354f6a8a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f8779325ff00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f87224134644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f86f8b6c3d37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f874e2b4dfc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f87590bd4ef6.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/papimi-nefewekapojerof-vorur.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/morijozaweve-radiru-guler.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/9633892.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/vifowisezifejega.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/1/0440/5254/5701/files/runelewinazadakevapene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3427/4723/files/www.pumarosa.com_dialog_the_house.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8681/4109/files/buzej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da50ee5-417d-491b-be1f-5d945c5ad688/zapozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd24a3f-05a4-4b25-ad18-da28dbeebaea/vojife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5833/1299/files/tidubogejufatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3182/9412/files/jrotc_ranks_in_high_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1207/4915/files/27667575401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9843/1381/files/12173505585.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_off00006a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A64 5208 bytes
SHA-256: ef08ad2e3bac1be4a4ee32106b4a836be89ca3441553e7ec7205fae88220f4b9
font_01_sfnt_off00007bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF9 10444 bytes
SHA-256: 70d9f66a8a515a726138147692dcb033fddb0a4afbcb3a06ab62255db341968b