Malicious PDF — malware analysis report

Static analysis result for SHA-256 9257f710e4e165b5…

MALICIOUS

PDF

54.2 KB Created: 2020-11-01 21:15:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-09
MD5: a46b305b1dfe8c085af81eed28e81829 SHA-1: df6901ad7d5112f09d06b44ed52e0dc9a86cb6f4 SHA-256: 9257f710e4e165b5b11ec0614591ac701904e75a7f9a44aa857c482901a10779
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/123?keyword=georgia+le+carre In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403118/normal_5f9100dfd3b73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379626/normal_5f8f65e5240eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421210/normal_5f9665b029507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5f929980710cf.pdfIn PDF document text
    • https://jopegivev.weebly.com/uploads/1/3/4/2/134234712/zukamexupa-boxisitej-pebawumuvoteze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f872f88dcba3.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/1/0438/3460/5725/files/29075673372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8050/6773/files/togerafulukuwisat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8859/2046/files/wutakilefiniroxidaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2936/4387/files/warisimubuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/99027161937.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52AC 17676 bytes
SHA-256: b1510624c63ff1158b27938ef0b2c3d3e1ed049206829495f87b78ae9a282715
font_01_sfnt_off00008be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE7 4420 bytes
SHA-256: 53dbe63afb0f986ed60d89a4f01098fbfc7dc1fbbc638688726e5a8c6e740def
font_02_sfnt_off00009af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF8 10272 bytes
SHA-256: cc94500cc664306529c79ccd696c92600bf433c3a6057e597840efc13cc35ba5
font_03_sfnt_off0000be1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE1E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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