Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8faa1168773340…

MALICIOUS

PDF

40.2 KB Created: 2020-11-03 08:11:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 979fae50bcfe1cc3d3c9a74aa326d962 SHA-1: bb5d3ef835646ecb9b7090aec607b6ef4cefbe2a SHA-256: 5a8faa116877334096bc184c2b1169263211a778bea63e1c296456a553c3ec49
134 Risk Score

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.
  • 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.me/123?keyword=2+room+tent+with+porch In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5f9645b24afe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_5f8b14daf1d09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f87605c0ed1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f86f57c73987.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/1/0503/6343/3120/files/dying_light_rise_of_the_phoenix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2871/0041/files/aiwa_super_t_bass.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5272/7972/files/46193615664.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/andhra_pradesh_tourist_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/tapioca_processing.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/red_brindle_dachshund.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/sifavixeda.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_off00006125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6125 4884 bytes
SHA-256: bfd9ef419708d27a3bbc42c49e126b7deca63534e029fdb436aac9e10a006254
font_01_sfnt_off000071a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A8 10080 bytes
SHA-256: 634e65e621f55bb873fc2f21137131513d925544fd5b38b74e01eb8fd5a88f2c

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