Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f31ef52102ec5b…

MALICIOUS

PDF

48.1 KB Created: 2020-10-16 11:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5bc20076ec59b718bc67d1db775aab7c SHA-1: a5756817a7e18b5ffafe87affe6f81dcd966f280 SHA-256: 27f31ef52102ec5b63706600df6fe3995cdfbc0f6ba78aba9317584539a8a552
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/123?keyword=2020+suzuki+swift+gl+navigator+manual+my14 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f8703160619b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5f882e763d81b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5f88b1d4b9693.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5f88c2de6acf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368746/normal_5f88d225b25cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f88a7c79916f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369928/normal_5f880b7bb7f26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374542/normal_5f8935c5cf7a9.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/1/0483/8853/8525/files/percy_jackson_the_lightning_thief_musical_bootleg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6858/2809/files/the_great_influenza_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/7601/0151/files/13452380092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c85779ee-f794-4c03-a3c2-b89cadd90137/runujetuviz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6505c861-9244-457e-9b3e-91f9fef80bfb/kuwikixiruwonamine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f37b4e5e-3d39-4fb7-935c-bde0d7583480/kibukorizivizat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8088d7f6-f872-47bf-b11a-0e710c42a0c4/wujavesuvekewezijenabifad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce4dc7e2-3cdf-4815-971b-f6e6bc4889f2/loditolago.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_off0000782a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782A 5772 bytes
SHA-256: e9c493ab0f05ad6503d6285270fb778baf32e53b74aabd965dfc3b1339c794d9
font_01_sfnt_off00008be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE5 12120 bytes
SHA-256: 9032a7116a2afd04cabf7fee389913513df38f60203d31eb4d193ef751c1d380

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