Malicious PDF — malware analysis report

Static analysis result for SHA-256 454dbfb5871de3af…

MALICIOUS

PDF

43.3 KB Created: 2020-10-01 00:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a5b06dae6e7cde9a8e661c55a5a8717b SHA-1: 341c86a668f806456942fd86b06b3e9fedd5b714 SHA-256: 454dbfb5871de3afbe0d9ee28b7581d15519aa30d6fcab03649554a67ad5aa3e
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://gettraff.ru/strik?keyword=senior+financial+accountant+job+description+pdf In PDF document text
    • http://dinedoses.randybaumgardnerforcolorado.com/uploads/1/3/1/4/131406082/0b78a3a60d6.pdfIn PDF document text
    • http://jikowiboj.tinykidzofparadiseca.com/uploads/1/3/0/7/130775198/vebur.pdfIn PDF document text
    • http://zibir.lucienrizos.com/uploads/1/3/1/0/131070491/rizetotapo.pdfIn PDF document text
    • http://files.amiesong.net/uploads/1/3/0/9/130969381/bakesijok.pdfIn PDF document text
    • https://site-1037224.mozfiles.com/files/1037224/dewemujifaxi.pdfIn PDF document text
    • https://site-1036818.mozfiles.com/files/1036818/78675863062.pdfIn PDF document text
    • https://site-1037192.mozfiles.com/files/1037192/jadiviwe.pdfIn PDF document text
    • https://site-1036900.mozfiles.com/files/1036900/48109559403.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/bd5d6d6d-32d7-47a1-9efd-20aedc5c804d/42197191296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b9baae8-3fac-4ed0-9d72-4f1be8d7753e/gexumakukisukeranezuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6627/7531/files/9864597954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1699/3440/files/zurodozavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/alter_ego_plus_2_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/56390015099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5371/1513/files/vpn_server_free.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_off000069fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69FA 5468 bytes
SHA-256: 1bc2ab5975a35bb28a94b2c97b6b9ea2eaefa57f658b18980239cd5d52ae04f1
font_01_sfnt_off00007c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9B 10324 bytes
SHA-256: 7d206c9254a976a8c29a37e58d619c4829e7e1e6a136e1aacad01097168a0c0c

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