Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce48975931d8dbe…

MALICIOUS

PDF

43.4 KB Created: 2020-11-03 00:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e31b39dc59ed64eede9f3ff73634dd84 SHA-1: 9bc124bc7648b9090e86cabeb4d6b8be55d4bd1e SHA-256: 5ce48975931d8dbef934e6f8a4de935f058b6c1ed2167c11b627c823c1f0108f
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.cc/123?keyword=5th+grade+saxon+math+book+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_5f8f5a8f3146e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5fa081d41bc82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388271/normal_5f9590aa0b145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f876ee26abdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f8f511d40c68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388412/normal_5f993f5d28588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421778/normal_5f9cc9b41844b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392873/normal_5fa07f6731cd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5f8d98c12786d.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/81ef6eb0c29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369511/normal_5f9e63659e83e.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/0c57b489-094a-40cb-a4bb-dcb9596e399a/wulapakerifapivafagoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b007a54-b70c-42c8-aa99-25230b1bc664/examples_of_innovation_in_the_workplace.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4909/3797/files/tajarutilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/8566/0828/files/22780171927.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_off00006bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCB 5540 bytes
SHA-256: 719b92b7195b6effdf1c50bbea421dd6a173afde902c947a24140be8c3a0f671
font_01_sfnt_off00007e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E77 10180 bytes
SHA-256: ab881ef1af626dbc4c335016682f9fe59782495f9e5a924a54028f9cb8d179a2

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