Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a0558a987b5848…

MALICIOUS

PDF

44.9 KB Created: 2020-10-05 21:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8464e3a44c6bc04284cc029ed5a389f5 SHA-1: df65576c96bf73782e1bed73e2f98270455c535c SHA-256: 17a0558a987b5848ad2b6609eb03a7d281e02d5dad81a1fc44af3af6a5748ef0
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=streaming+dragon+ball+super+broly+vostfr In PDF document text
    • http://files.yourfamilycomfort.com/uploads/1/3/1/4/131406817/fb9807c4533a239.pdfIn PDF document text
    • http://files.wormfoodforthough.net/uploads/1/3/0/9/130969243/e9c22e71c4f8.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/8cbae804-5ddb-46a0-bec3-02a2b5672694/mubizojutuwidoromorub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2afa299-9890-40c3-9233-bd83281fc345/80486537997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab0b5c2-65b4-4aa1-b200-402087a2b78a/15653494906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e80a112-2c77-48ee-8c3b-ccaab1c395e6/49830893320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5525/5204/files/inner_worlds_outer_worlds_watch_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2291/2157/files/82217082930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/9970/1406/files/povilid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6842/3330/files/27807523172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4372/3163/files/g_kho_gng_ting_anh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/951781ec-02b0-47e6-8b66-7f83a9f38754/dizogovugoberapebeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23d8ee1b-8799-4279-a0f3-32fa8db1b6b2/95514443622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c037d1f7-ec31-45c4-b03d-817a7efd5955/suvogokolobojivujaturanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d15f47c7-2aa6-4726-b707-c85a273a0ea4/tukolewotigevarip.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_off00005971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5971 5768 bytes
SHA-256: 48afbf73a2cb62040d76751a9ec63ff6fa980bff28a0341be5d664fbbb5ff16f
font_01_sfnt_off00006d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D09 10652 bytes
SHA-256: 98ebd755e29732ca361b99b7573bbbbb486971a38d6a775cb9e1de2f33f5c679
font_02_sfnt_off000090b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B8 16240 bytes
SHA-256: 795d0c4c856ef829f41d99e58c6c382f123120f3ecf4c5a6d3002c793aaa4d9a

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