Malicious PDF — malware analysis report

Static analysis result for SHA-256 f587ee2e2fcd4a8d…

MALICIOUS

PDF

47.2 KB Created: 2020-11-01 18:26:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: a49483dd105cdc8224f8981f922addbe SHA-1: d46f4c3cd72a2d8feea70c3b72bdbee06b57c4ea SHA-256: f587ee2e2fcd4a8d7350af87fa1b255eb21422b800d81fed983e69cfb6334ac5
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://cctraff.ru/pify?keyword=teddy+bridgewater+free+agent+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426944/normal_5f98927e8d129.pdfIn PDF document text
    • https://gizumefelaz.weebly.com/uploads/1/3/4/3/134318195/3ddbea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f8e4811bb071.pdfIn 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://cdn.shopify.com/s/files/1/0500/4489/5392/files/25648484712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8682/2554/files/plastic_wrap_texture_png.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f98673cf-9563-4ab6-98f5-87cc6ca70a77/rutepasijukuzuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7020/1255/files/talamoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/9075/2666/files/data_ingestion_framework_architecture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5105/6804/files/rukiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8216/1053/files/it_came_from_hollywood_imdb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9000/8994/files/xaxoxiwukibukidaruso.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/learn_acoustic_guitar_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/8298/6675/files/harry_partch_was_a_serious_proponent_of_microtonal_music.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_off00006a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A80 5100 bytes
SHA-256: a0d80227066f48a2e8a5a2f9652096ff88b328c3a517a98ba50039b868eae097
font_01_sfnt_off00007bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF9 11120 bytes
SHA-256: 01cf55c1dedd3a75f4cf6aff337d0b80983bf10c16a1132a81cb39529321976b
font_02_sfnt_off0000a1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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