Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c9a1684cc1f896…

MALICIOUS

PDF

41.0 KB Created: 2020-10-29 16:34:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8f26e96fcea6cf9ebcb19085603e648a SHA-1: a4f249ee1171880e52c0745630e3e608016fbe7f SHA-256: b6c9a1684cc1f89657f9c29b9057a0831b45bf238b26eaa519a9a895cc5313a1
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://cctraff.ru/aws?keyword=norman+high+school+counselors In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406514/normal_5f99933f4ae0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f8d61762651f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385030/normal_5f8e377319e68.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/1/0434/0780/2518/files/solid_waste_management_in_bengali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6999/5715/files/91577751008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6370/4255/files/movolawurijezolikewusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/download_temple_run_oz_1.6_7_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/927b3933-f958-4d49-a2df-acfadf685549/firuluvedilanur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/26827295573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c1e48c-4384-4b22-ae29-a9bac8605db7/79903300458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57c18aef-2c1a-417b-91b7-385fa14e75e5/5639606517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f39aa3-81c3-4d7c-8c7b-a1366f5932b8/91608050787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9227/3061/files/phoenix_rising_pokemon_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/baturugivajekelidokino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c2e10f-fe88-435e-983b-4121a6c3d3b2/14231453816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7927/9812/files/shackletons_journey_book.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/zazukesivigoxamake.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_off00006407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6407 5184 bytes
SHA-256: 6efa9fe4eff1c6ec2d05bbf3c5b680b93811a277d28502e790d032135717c13a
font_01_sfnt_off0000757e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x757E 9864 bytes
SHA-256: c114a15c4b407a9e5ce9e3d2afd662653de1e7dda3ceb93e58f2f092719d89a4

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