Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffed153273d3b380…

MALICIOUS

PDF

40.8 KB Created: 2020-11-06 09:23:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 38342df86657f46c42ebcbf4ed09db0d SHA-1: 6ded8d104be9242dc0fb83a738cb771fbd8f1d34 SHA-256: ffed153273d3b38078873707ddfa05e9c286a9bf741733f0b9263fe418ac6ab7
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://traffking.ru/123?keyword=courtyard+creations+lawn+chairs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f9cb0bc96b6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f88a8b733d9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5fa3ee602a1e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_5f8c6759897ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_5f8e4de50421f.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/zamozojofijife.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_5f9cb55b39052.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/386b575e-0c1e-4433-8315-8c1a9bb12fd1/90824819419.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/commercial_aquaponics_system_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0006626-e2cc-4bd3-98fd-6f73d11c1a94/34605783016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db63f49-8148-489a-9ddd-e4611252434b/51413508779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dd3334f-877d-4b52-a76d-a639ad5d0b6b/1431337880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a57237e-c0da-4bb0-b7f1-c77f0cf9b89e/kindergarten_homework_packets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/061f70b1-4a49-44ca-b197-8fea541a477f/dgro_etf_quote.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_off00005f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6F 5128 bytes
SHA-256: 3630693529bcac17028b4c30bae2306d5aacd1bb707a6c4f96dd50981511ba77
font_01_sfnt_off000070ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70EA 10924 bytes
SHA-256: 4fbe33f1c332eb93a95b546960a07016a4dede9b9d95b2d8b371896d83b0c949

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