Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35a9c416d295fd4…

MALICIOUS

PDF

46.8 KB Created: 2020-10-31 17:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: f6fe2d09cd9b0589eefaaad3a77a24d6 SHA-1: 53f048a4d496b562eedd9337561ce08a60dfa1d0 SHA-256: d35a9c416d295fd4f0347a3128282a61861c519d7269f7bc5cc78dc479e781c3
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.me/123?keyword=dantdm+happy+wheels+new In PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/saronesoxerure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5f9a720de90df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_5f8a1dcf8cae4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f88992e411ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/laradusa/zudunabipev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/775ae0de-9555-4d6d-b15a-4e9cb3b83893/zukuxi.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/blank_motion_form_michigan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3331/6514/files/19499171886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4182/3164/files/15352623127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6791/1573/files/chicago_to_detroit_flights_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2be99491-58bc-400b-9430-be14accf33f5/69039082347.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/types_of_antisocial_behavior.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_off0000789c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789C 5296 bytes
SHA-256: f19995fa9f7dee43635d24215e8dfaa06179dcc5790638f2f1b231e87beff267
font_01_sfnt_off00008a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9B 10468 bytes
SHA-256: 2080d502d1580f56b44901b3ec8b16eee5b211ec1b895dbdf95f9443c374b3cc