Malicious PDF — malware analysis report

Static analysis result for SHA-256 31343cede3253ef2…

MALICIOUS

PDF

45.4 KB Created: 2020-10-28 22:45:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5770e22900a6922b0cb77e3f805a21c0 SHA-1: b151a018bc7cb0d86deaf9d4aa574701859882ce SHA-256: 31343cede3253ef2eda6c193e538d102117eb7427a92b7ef632648352db4480c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to a known malicious redirector at 'https://cctraff.ru/aws?keyword=the+final+empire+pdf+download'. This suggests the document is part of a link farm or SEO poisoning campaign designed to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/aws?keyword=the+final+empire+pdf+download In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7a9f585e-cd0f-4503-a427-15b542c3adb4/79731828536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5289/8739/files/kendig._enfermedades_respiratorias_en_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e02df42-109f-4b4e-a947-f1227be0082a/puges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13b15107-9322-4e5f-9a22-5dbbfaac00f8/.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/gibafezudepiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd2b8a6f-665a-4ed9-994c-ede6d6504a89/18455275866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c658187-239c-4d82-b415-ace75bfa1a27/sanijonomem.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/canvas_model_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0c2afc6-29e2-4c69-a404-f599584737fc/jamirulusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca6e117-7e50-4a28-9d32-89ff2d8672ea/sugujokasadisepebofi.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/49559215607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5800e7b2-9f14-4d84-a4d4-be69bf28eae1/36618034606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8463/6859/files/cromatografia_de_gases_aplicaciones.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/5290487210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c586c7d-fec4-4e6e-90c9-1ee10cf10983/xujesiwejumakogize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2693/2124/files/zezabozizepidovatulujuf.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/rainbow_unicorn_song_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/tiwirutazorewek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79a82f58-e92b-4ca7-8849-c4c09c54599a/28909103147.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/55175371782.pdfIn PDF document text
    • https://www.cancer.gov/coronavirusIn 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_off000064a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A3 4852 bytes
SHA-256: 37e7adab76d8d487fea286c02c56b880bcd264aa9e05eeb875a00f85a1041060
font_01_sfnt_off000074ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74ED 11368 bytes
SHA-256: 3bb68e5e153cb9241df989812d1ddfce4c8efc6c68bcdcb5b5b45a6364d66477
font_02_sfnt_off00009a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A4F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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