Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ffd311ef38f515…

MALICIOUS

PDF

41.8 KB Created: 2020-10-08 11:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8984ff2d28f6b6809ed35c024c02e141 SHA-1: 7f5ce3fce038db341da6609d840671fe01628363 SHA-256: 20ffd311ef38f5156bf3a56d0c47f0ccd297a2893bf49b8daa242778974801eb
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.com/pify?keyword=the+santa+clause+white+christmas In PDF document text
    • http://files.autismtelemed.org/uploads/1/3/1/4/131412235/9320ba21ff4d5.pdfIn PDF document text
    • http://sosobu.lavieenblanc.net/uploads/1/3/2/6/132695746/6be9e5.pdfIn PDF document text
    • http://nakivubor.jonarcherdesigns.com/uploads/1/3/1/4/131453943/e5e094a.pdfIn PDF document text
    • http://files.southlandfamilyclub.com/uploads/1/3/1/3/131379371/e862cb.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/68e0a8d5-bc94-4248-ad63-53e92cd69360/vefixitixuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fadad118-b93e-4a60-9b4b-4102bd42ead0/dejejolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec13d303-31f8-49e2-b18c-0e4979f323d4/57774456370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67bce508-8814-4b78-9f83-a384774c8adf/41841622099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52de9d1e-0f40-4bab-936f-0d1f43b686b4/pozuvaxazetis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f259adb-f15b-4b8e-bf61-e7960c6489fd/kabelobajidowokewubixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9528497e-4a05-4ace-a8c6-df97609866e6/jezom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7326/8633/files/suing_a_judge_for_bias.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6038/2881/files/62004351420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4895/5815/files/88991624054.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_off000065b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B7 5080 bytes
SHA-256: 321aeefe61e1566a31ac680c53a58316b8403d42f37008cbd98fdde9010c03ae
font_01_sfnt_off000076e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E6 10276 bytes
SHA-256: 47ff76c3b7aae7b1f5a89ebaccad197e0598c39aa8979e4d5ea564d8250b082c