Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd3c2eabf9c13e9…

MALICIOUS

PDF

47.4 KB Created: 2020-10-26 05:48:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: dc4df28746b0bd0f876c58b718976f4e SHA-1: d3906710067484ca24ac3ceb52dd979a756b7f2f SHA-256: cbd3c2eabf9c13e98b2e7bf85c70b789a33d8e8ef1b69f990d7b2ab0c500e76a
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.me/123?keyword=reading+comprehension+worksheets+2nd+grade+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5f87b32d27168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f88846b93bb9.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/vuzipabujunaxi-segedimusot-ligijiroli-ripapuf.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/bisikerotofixevemop.pdfIn PDF document text
    • https://jaxuwigoba.weebly.com/uploads/1/3/4/2/134266140/4357314.pdfIn PDF document text
    • https://fovavizudaz.weebly.com/uploads/1/3/4/3/134375550/3bee1c.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/1571621.pdfIn PDF document text
    • https://gonoloxezejuje.weebly.com/uploads/1/3/1/4/131410007/063e1033f0532.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/lebelenufe.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/f5d445.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/1/0495/1307/0758/files/nosuwikogug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4367/1194/files/awesome_planes_mobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8309/3910/files/joniravefunetawake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/maytag_bravos_washer_manual_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2693/7494/files/hive_smart_thermostat_installation_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9507/2674/files/xovotutewale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2785/8076/files/62825570393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7006/0213/files/melede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c528a1-d31f-49c1-a797-649a542f6a37/48342240700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db50bcd-fd14-47c6-b870-0171a0fe1649/vijimijojovanopavomid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/729b43a2-098d-4349-801b-025ea307d547/samexefidedujowor.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_off0000779c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x779C 5832 bytes
SHA-256: a1dfd9e5f13ff4fbc71bc1a0ad1c18561646b65121ed6a42000044da6df5e092
font_01_sfnt_off00008b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5C 10632 bytes
SHA-256: 5e41508b08233b495186bc3df04a89895c94587c2297c86c1649ad68e644df30

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