Malicious PDF — malware analysis report

Static analysis result for SHA-256 517da7953851c041…

MALICIOUS

PDF

40.6 KB Created: 2020-11-02 12:32:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 7b813c5eeab3e3af397dd0e6f5266e9e SHA-1: c6dfcb6226167876d78fac7113af4cc6050df9b5 SHA-256: 517da7953851c04105965a52348185700b0ce93e19421552e94b7d7f2e82c586
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/aws?keyword=tree+of+savior+plague+doctor+build In PDF document text
    • https://najuxobetejip.weebly.com/uploads/1/3/4/2/134265875/favigox.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/55331fb9a2e434f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5f8eeb4b0c20f.pdfIn PDF document text
    • https://niramividaro.weebly.com/uploads/1/3/4/5/134517418/ridipikavoxifug.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005e13.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005e13.bin)
    • https://cdn.shopify.com/s/files/1/0467/9955/2663/files/the_thaw_movie_hindi_dubbed_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/adobe_pack_trial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4011dbe-ef12-4ecf-bce5-5c02cfbf837a/xexug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8886/9055/files/free_empires_and_puzzles_cheats_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3005/2005/files/fabinaramimefesepabitel.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 extracted file (font_00_sfnt_off00005e13.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E13 5472 bytes
SHA-256: 0ef32e846f298b9bb273c3e44d87cd9463b3d3bade642c31a6c12a883f4c5645
font_01_sfnt_off000070c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C1 10984 bytes
SHA-256: 3518348f0bc199808f89592cdeb1afd30d7c66c9c0ffbb9ac8e9527c4b9d4ab3