Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f6ceab7150aea14…

MALICIOUS

PDF

42.9 KB Created: 2020-10-09 09:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1ac1c5760775334c4605a7d4b3f9c7e9 SHA-1: 6dd4ddb5488f521a0778974b3c4a2bd02ed8008c SHA-256: 0f6ceab7150aea14477aed738bb1362ed0d280f0bd296f0ad7c1947b4ac5b457
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.link/pify?keyword=ya+tebya+lublu+ne+demek In PDF document text
    • http://vanari.ron-warren.com/uploads/1/3/0/8/130813403/dc1b39282d75bf.pdfIn PDF document text
    • http://files.wildoneslansing.org/uploads/1/3/1/8/131860204/sewitivenonodemoten.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/1/0432/1384/8731/files/57465066033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7100/7637/files/40317557759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7984/7074/files/chapter_4_sensation_and_perception_study_guide_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9199/8360/files/java_a_beginners_guide_6th_edition_by_herbert_schildt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1044/9830/files/10192609657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6102/6719/files/8563680503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c33247a-1ed2-4fee-9953-88e0eedf3604/86049929777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1fc8fc-32d0-4b08-b218-8b1a737bf400/21596554808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df0c17e2-f979-4bb5-9ba6-2f228559112b/ditefabaditepubux.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53B7 4964 bytes
SHA-256: dd68239daaf3f7104db3521bb09ead7cd915fdde1da6050982e69f1b42f9a9d1
font_01_sfnt_off00006492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6492 11604 bytes
SHA-256: a05bc57fd38a3e177dc7f854a95b33dd87d64af4b12b2585c18cdcf13cf5c798
font_02_sfnt_off000089df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89DF 16208 bytes
SHA-256: da4b164e559004f6353f0a5dc6ff39c750a4dde01d42a555aa960bfbd3bf1c3f