Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2b5e35c3f837821…

MALICIOUS

PDF

44.2 KB Created: 2020-10-15 10:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c8f5a993114900dfe65b51a797c4e5a2 SHA-1: e51b07deeab22b12b88fd4c8a8e4d4c24be5af5a SHA-256: b2b5e35c3f837821d320605b71616d30e367f256d1904ee0b18f796e55711687
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://gettraff.ru/pify?keyword=directv+spanish+packages+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f878c470241d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f874384936e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f87831648663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f87e6c74722d.pdfIn PDF document text
    • https://site-1044015.mozfiles.com/files/1044015/zebarolasatiganuxekegib.pdfIn PDF document text
    • https://site-1040238.mozfiles.com/files/1040238/2020_subaru_outback_infotainment_manual.pdfIn PDF document text
    • https://site-1043458.mozfiles.com/files/1043458/folorolufegupidoteda.pdfIn PDF document text
    • https://site-1038378.mozfiles.com/files/1038378/telexotufi.pdfIn PDF document text
    • https://site-1038825.mozfiles.com/files/1038825/bubipeguxovi.pdfIn PDF document text
    • https://site-1040374.mozfiles.com/files/1040374/jagotor.pdfIn PDF document text
    • https://site-1040005.mozfiles.com/files/1040005/47652912165.pdfIn PDF document text
    • https://site-1043571.mozfiles.com/files/1043571/ranunovetexikefi.pdfIn PDF document text
    • https://site-1038532.mozfiles.com/files/1038532/manekugezamuzexo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5007/2214/files/honda_b_series_turbo_kit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5772/3030/files/wisipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9387/6118/files/antecedentes_historicos_de_la_geometria_analitica_linea_del_tiempo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9969/0910/files/birefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2257/1930/files/kunita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1478/9541/files/stealth_bike_rack_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5466/4342/files/65821920373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32e43b53-f161-45a3-96be-4cdec090e575/miropiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73af7d58-7368-47d0-8573-9c95dd783f7d/26442079203.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5973 5188 bytes
SHA-256: 6b00dca170b806ab68f80a26be44d99228572669e11fe2f2e328df05870cff88
font_01_sfnt_off00006b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B14 13256 bytes
SHA-256: 8f15422f2297a491f8ad277e9030a4442beebb053efdb3009d731ae3316a0f8a
font_02_sfnt_off0000952b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x952B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3