Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ce3031a8d5bade…

MALICIOUS

PDF

73.0 KB Created: 2020-10-16 13:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a8bbaa270d53d5b1977518197a467a6d SHA-1: fa7b5ac5d8fefa18de91830f8e10022b478f2408 SHA-256: 01ce3031a8d5badea3dd369e76d060ef4e3f2b77dbf559ef3a9a6aff5649af4a
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.link/123?keyword=characters+of+robinson+crusoe+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368505/normal_5f87ba5c72161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f873bdb632e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f879bf9260f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f8732a2cb8ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f87c1bae620d.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/82c7154b-e0de-47f3-8541-4464c85994e5/xemulitodinipukifino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae1c24c-ef48-4246-ba4f-d9c4f2878704/pimefemivulubolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a24a6305-6d18-4cb9-8682-8d1ae6be8715/69944958184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f71fefc-ffc4-479d-abf3-91fd98e3dddb/77830616988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eff8c9c-c4b6-46e1-837e-ed33c3b939c8/lopomikadimutex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f3a4411-103b-4074-8291-ad5fea4ab00d/34013660206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5fddf29-1eaa-43d5-a283-850d42217387/64399600932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65f2a792-77f3-404d-846f-d09fb6b00ac6/bukolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1c3fbc6-bea8-43a1-918a-b0e9f4a0800c/47049597207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9354a0ba-49ac-4069-a2b4-c17027321458/88319997289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6683/3088/files/46956305697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0490/0805/0343/files/44510582725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a80f0c8-eb7d-4e53-b236-bb9138f4a924/vevotiwevuwawovijapizala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfa33e03-526e-4b9a-b965-ffba2db9c302/49047809584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0150524d-2b1b-40e8-b8ef-302066d1f2fc/bobobefamogim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d874de8-a1c9-43f3-9065-6ca3531b750f/nifemejigatili.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_off0000e0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C7 5256 bytes
SHA-256: a495ef9c4a49a46649bbea921f54ba83c9a6c691d6220c384cf192d11c920999
font_01_sfnt_off0000f296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF296 10392 bytes
SHA-256: 90e883112a1c719a81a9991b16ae9cf301e863565c4240928f8c23a5ea684ccf

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