Malicious PDF — malware analysis report

Static analysis result for SHA-256 0815ff70bf66bbae…

MALICIOUS

PDF

42.7 KB Created: 2020-10-09 02:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8e59dce0a2eab634b08a3355c78b4a54 SHA-1: e707b68168049abb29078f4cbbe3e7173121c4d4 SHA-256: 0815ff70bf66bbae803e29488866787c0f3dffec34fa0b4af313d1f0067e6898
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://cctraff.ru/strik?keyword=diplomat+elite+dishwasher+manual In PDF document text
    • http://files.thinkingoutsidetheb0x.org/uploads/1/3/1/3/131379749/kuwuguxufo.pdfIn PDF document text
    • https://site-1043925.mozfiles.com/files/1043925/12198382841.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/xogefomuxisozimef.pdfIn PDF document text
    • https://site-1038618.mozfiles.com/files/1038618/20519817795.pdfIn PDF document text
    • https://site-1042987.mozfiles.com/files/1042987/zoraralirotuxujudebine.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/2ebaddbf-b5d4-4527-b076-1f445d4d061c/budedokitobifivul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45dd8b50-4b3f-44a3-975b-2b8483d13bef/17835037477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ed5c5a-31ac-4f32-8d4d-09e98457ed5e/5771767695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed14bee6-1041-4cfe-8807-bb00eda8d2aa/88485867990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31403fee-34ab-407d-9b9e-ad27c6c2485f/15220949136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/8225/2957/files/ryan_started_the_fire_lyrics_marilyn_monroe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5018/8443/files/heavy_rain_jason_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5673/2581/files/metals_by_density.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/3092831708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/13263715994.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_off000068eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68EB 5288 bytes
SHA-256: 87d5997a4b9bd9ab61e1e47384b74b5ce0ff9af74767575e1fc983cc45bada41
font_01_sfnt_off00007acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACC 10352 bytes
SHA-256: cee6941f717f51630b715cf5c7c161829cc9b06057e98a16a6cd9241f0117d25

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