Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6dc2447a714a874…

MALICIOUS

PDF

43.3 KB Created: 2020-08-15 04:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 88de05a9120982efe41c278b864270fb SHA-1: 64cdbcae9fbc861bca2b8331474ab791961744e7 SHA-256: a6dc2447a714a874125547ef0af52a289857138adc97ff80372e515d072f6a01
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.cc/pify?keyword=breckenridge+ski+area+snow+report In PDF document text
    • http://files.advanceadvocacyandsupport.com/uploads/1/3/2/6/132696155/xokodukin-nugutirunus-lesewozowezuv-xutubinovuli.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/1/0432/4157/0466/files/base_de_dados_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4103/8234/files/papifenabivak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/95989822725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/97241754855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9893/8274/files/fanexegawosilenorirerubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/57480082087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9195/1769/files/26253427811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2154/1277/files/genuine_aircraft_hardware_reference_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6558/1468/files/jifevivudow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/minecraft_server_status_checker_html.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_off00005b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B77 5200 bytes
SHA-256: 46cfa2def4475566e3be49216aa5077e71629d3acceaa58b43f09a00979860e4
font_01_sfnt_off00006d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D47 11124 bytes
SHA-256: 88ea09230f56c679bc2cd8b04b9847836c00f32a009be1086331d4631c8b78fe
font_02_sfnt_off0000928c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x928C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361