Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4dbcc2b288675ce…

MALICIOUS

PDF

50.3 KB Created: 2020-10-14 23:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 267e1b2b81de5b4ee68e965b71cb4093 SHA-1: d676b0b9229c5d9f3df67fbb3e0dc76da8835d52 SHA-256: f4dbcc2b288675ce92432f2bfa8851aba5b5611da5d6911821806935ef880858
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.club/pify?keyword=amazon+music+app+keeps+stopping+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f870157b2714.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367640/normal_5f87524063dc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f87336430f23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f8759d6bb1c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f87167c603f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f870a963b462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f871801126fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f872df9a1502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5f8727ac96fa9.pdfIn PDF document text
    • https://site-1038811.mozfiles.com/files/1038811/kuvefopojimakerili.pdfIn PDF document text
    • https://site-1037279.mozfiles.com/files/1037279/1330874001.pdfIn PDF document text
    • https://site-1038743.mozfiles.com/files/1038743/logeniles.pdfIn PDF document text
    • https://site-1036996.mozfiles.com/files/1036996/45352723640.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/1/0435/2920/7957/files/longmont_high_school_softball.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9291/1298/files/tamugubosutad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0923/9972/files/once_im_7_years_old_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9992/8741/files/mapping_latitude_and_longitude_worksheet_4_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c575fa43-0021-4734-bbdb-d9ab4d465d24/bujuxevizibud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfdd61a8-aad2-4a4f-aeb9-79e91fde68fd/19856304416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05fd3bc0-e0c5-43d0-9a35-9b276ef64cd5/sowagifumatol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/807d21ad-a6f3-4a05-9f4b-c2071ae0f539/winelotinibukobiwunawize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c4d8f94-fc29-4c40-82c4-cab00cb5bf28/dudesufejexusedebejomov.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1B 5344 bytes
SHA-256: e832a5cccad6769812e106f621298ae2b8bfcd2e3e872b5d22bbece8cf66e06e
font_01_sfnt_off00007e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E29 2876 bytes
SHA-256: f187bb83f403962fd5ede0c989533cb7a4a925d59e1fab53e55243a4822de9bd
font_02_sfnt_off00008a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7E 10128 bytes
SHA-256: 38e2e369b4decdc145bec850e3e4802d646d3e56aa7308f936afb4e4fd5974b1
font_03_sfnt_off0000ad33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD33 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333