Malicious PDF — malware analysis report

Static analysis result for SHA-256 520a0856e8e722f7…

MALICIOUS

PDF

56.0 KB Created: 2020-10-28 00:43:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b63ecb173f3fb12953bcfe00b88d2388 SHA-1: b24529d90ba21593b4d8a07556f13abadf788763 SHA-256: 520a0856e8e722f78fe999c35a522be9367202ca03ecd68e22dfc690d04f5e9a
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.cc/123?keyword=venture+deals+pdf+portugues In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5f914c1cb0508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368777/normal_5f87c1a5d0ad6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414873/normal_5f989e2003ce2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_5f8a00c72ba1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5f8e568582b0a.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/5dacd.pdfIn PDF document text
    • https://kunulidozejenu.weebly.com/uploads/1/3/3/9/133997834/ladazexuvepowe.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/galudi.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/1/0431/3455/0177/files/ever_be_chords_g.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3272/2599/files/galaxy_buds_manual_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1281/5010/files/nomijujonaroribos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8644/4699/files/57274820565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16a5bd5a-f77b-47a1-9828-753eb83cef95/hallmark_jingle_dog_phrases.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a477503-0bae-45bc-88a6-4cff5deba4e7/38908283494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee21620e-b0de-4164-82c5-507596055809/87776671007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1437ca0-4025-47ba-9e9d-64e5b05861bb/20121126049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a678de9-89bb-4a86-a700-95bbcbfd6f19/51636679911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f73ff65-ef5c-4840-b7e5-58de6289956e/78253900501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44beab54-c548-4958-afbb-54552d664f44/lambda_aa_meetings_san_antonio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd6f7258-4bd4-47d0-b1f8-a79d9f9bb136/venta_de_tractores_agricolas_usados.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8199/0293/files/phu_quoc_tourist_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9713/8352/files/lugafa.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_off00009d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D05 5176 bytes
SHA-256: 1b3efe003efbc04124311caa63f2905190a52cdb8745635a892700ac775f0584
font_01_sfnt_off0000aeb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB0 10572 bytes
SHA-256: 22caf7aea408d1fcbae1014cce975796f9591fb3ec8269d3a47c2cdd40201ddd

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