Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8683873063e1b6…

MALICIOUS

PDF

42.3 KB Created: 2020-09-01 14:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c6075012cab140169dcd61c70c14801d SHA-1: b24ff82ded3724f0d8288b63a062af469cfd0e17 SHA-256: ae8683873063e1b659b8315a9f6f7e03cfe49e701bc190ecb1103d1e7d593e08
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://ttraff.link/pify?keyword=bogor+valley%2528+formerly+arnava+bogor+hotel%2529 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/a4d998_be53284495e243bfb29a7912d3f5de0f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7dd30d_9939a2e8059f4e7695d0a1fb75f9d1ae.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ca300b_3fce4c6fef2d47b39d14cd8559e6163d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b88a168183e74e4495651ea79352d3bc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/68725527756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3315/6001/files/snakes_and_ladders_blank_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31178329868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6931/7013/files/zulasodogexo.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9a533beecad245c59d93b09b0b65424e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4117a9_95828bbc8ee147ee8628435fff38160c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ca300b_e51562e9ef17429a8769e6b227db0392.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f46427_384f03634c5846a9b3de55f563d9e4a8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f65518_da308af0a5fc441aa712dc0bf155cea2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/24853a_263cf6fc08674bc598f2b9b2c27fd7ad.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3e9e83_59903bafcb504b978e805f2abd381ec0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_84ffaf7a36a94757a98a5ce6466eac04.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_off00006110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6110 5508 bytes
SHA-256: b9f2b4a007b13ab01bc911c2273a1a351b8bc368ec9a4de017e921bc4b26ec0b
font_01_sfnt_off000073ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73CE 12584 bytes
SHA-256: 535ee2aa324de50089e6e1c3ca76329bfc2c820143f48f963ea2b36dd0c3b817

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