Malicious PDF — malware analysis report

Static analysis result for SHA-256 626f3719f95ea347…

MALICIOUS

PDF

35.3 KB Created: 2020-10-02 05:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 47a36e15db76d6454d8833670583edb1 SHA-1: b8a467e75773177a3d15ce04aa62ac88ce6cc063 SHA-256: 626f3719f95ea3470c5cc86e8a0f26184a3eec5f3a2f9d393dab927660265b42
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.com/pify?keyword=splash+car+wash+dc In PDF document text
    • http://files.victoriameade.com/uploads/1/3/2/8/132815213/figor.pdfIn PDF document text
    • http://files.luxurybybrezotours.com/uploads/1/3/1/1/131164164/paruzuwazo_zibopumonumono_dezix_fubixolazinofip.pdfIn PDF document text
    • http://files.milescrosswhippets.com/uploads/1/3/0/8/130874254/fukokegis.pdfIn PDF document text
    • http://files.midwesttoken3d.com/uploads/1/3/0/8/130873951/nelozebufopavobisali.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/1/0496/5859/3431/files/jibaxakopizubaxezutovoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3297/9867/files/thomas_maze_runner_last_name.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59371296-c7f9-483a-9527-2165d20ef1e3/detidelibaxixabepis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d79a9256-2032-4397-a812-aac21c425925/bonipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f0d1ec6-1d00-4232-ba5a-0453380b0306/67413897843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4ca3fc4-3a83-4437-8a41-c2f09c77506f/92716227991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9eaf50c-896e-420d-8bdf-391334e1d93b/tubevoruwoturilowabi.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_off00004a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A45 5356 bytes
SHA-256: cdb47b1eba0e30cb1154d2093c9fb9314f5382de939c513a14baa308eac7addf
font_01_sfnt_off00005c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C85 10668 bytes
SHA-256: aaa67b5147e04b06c231198dfab2004511e6b41385e5626ab3b7594e14d0816b