Malicious PDF — malware analysis report

Static analysis result for SHA-256 55c6d9741f6066cc…

MALICIOUS

PDF

39.7 KB Created: 2020-10-15 15:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: b81bcaba60f5d20df8947b71d7936c64 SHA-1: f5c5e109e3482911ec4aa37413fd1b9c1f30c105 SHA-256: 55c6d9741f6066ccd6a6e8c3212b79e5c0cf837d2a39aeccd654a97dbdbcd027
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/123?keyword=hp+elitebook+830+g5+user+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f8716b4ebec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369336/normal_5f87bed21f40a.pdfIn PDF document text
    • https://site-1040374.mozfiles.com/files/1040374/gusedadoduvobutatuka.pdfIn PDF document text
    • https://site-1040424.mozfiles.com/files/1040424/vijikosisiganava.pdfIn PDF document text
    • https://site-1036629.mozfiles.com/files/1036629/pinoxebatodanasixirave.pdfIn PDF document text
    • https://site-1038924.mozfiles.com/files/1038924/birot.pdfIn PDF document text
    • https://site-1044024.mozfiles.com/files/1044024/zujozur.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/98e88eae-1c0a-4a05-9e6b-e478e7807792/59595316668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e78d74f-3972-4b83-bf2a-066485499947/52516124424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d5254d7-51d0-484a-9d90-c6521650965e/2299460579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aed48a5-1a6a-4e9a-bc61-9e87a3ce4c9b/67819153451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4672/2969/files/ikea_desk_lamp_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/9438/9151/files/my_hero_ova_hulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5343/9912/files/47204292686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c39d30ca-18f6-4918-96cf-94ca12ed348f/51409251648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0020d1c6-568b-4c2e-8f4d-2c1617e2333f/16284898019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf724451-781e-4ac9-a6fc-89a259c9f5f2/44585128565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/867630ff-0cfd-451c-96f8-46c3b6373aec/pamelipuxewiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11b26d29-36c9-4e04-bf0e-c16f6aadc1b5/99942624577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17722595-c7b9-4e5f-b9af-feb120d80ee5/tafejedomejavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c7dfe28-d68b-4647-9f3b-b9123555bb09/wokumorokasevunafupir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3031929-2bcf-4ece-b62f-854880a0a6b4/biruxez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61cff3af-c4d8-4af5-88c3-cf3a232c6005/99215024461.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_off000058ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58EE 5928 bytes
SHA-256: 148c356045640324cb3cb0fc42f5785746775318f7cf1e1f7795587ba95e0fd4
font_01_sfnt_off00006cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF5 10492 bytes
SHA-256: bb7ed86bf7a93324378134d8900348986cdc22d044f6ff516a59060d5183198e