Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8771b0e17088ac…

MALICIOUS

PDF

56.5 KB Created: 2020-11-04 04:50:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: fd442895ac6a3333e97005e4a6e5c27d SHA-1: b60904fb206f1f8e18b4b30346ea23f8646569ac SHA-256: 6d8771b0e17088acb1921675f18abbf10ed0263237e77dd14a45442a06bab464
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=guilty+girls+rc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411944/normal_5f99cff7b1800.pdfIn PDF document text
    • https://sopopubepomexak.weebly.com/uploads/1/3/4/2/134265445/viwosapamokofora.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417049/normal_5f959027ca5f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370762/normal_5f8d6489a59fb.pdfIn PDF document text
    • https://gasomuvujutomeb.weebly.com/uploads/1/3/4/3/134356107/pubini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417536/normal_5f9dbda87b341.pdfIn PDF document text
    • https://vumorusumanipav.weebly.com/uploads/1/3/4/2/134234742/dfc69e74491f.pdfIn PDF document text
    • https://renesixedobalew.weebly.com/uploads/1/3/0/9/130969137/vepipokebewa.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/1d035e10-e97e-4bd2-b67f-c1e69778b9c0/agile_methodology_free_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/60659904213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fab8a9be-a5a3-4c79-be8c-04718d8b135b/interet_simple_et_composC3A9_exercices_corrigC3A9s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298a8191-5c62-4b0f-a102-66aa98d510e7/garusemofomizudofofameti.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/fatofodojutotomon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7638d6e-7ef6-4c70-94d5-c30ae20c6136/bogojoxumagenuki.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000094bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94BF 4892 bytes
SHA-256: f0e07455f820426462221cbce7447cf8879625742bf2710eb07754ae6ea46d04
font_01_sfnt_off0000a584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA584 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000ae11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE11 11644 bytes
SHA-256: 2554f5618e723d22fa1c7ebc9c573bee512a3ff0943633e8fc9348d879e20098

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