Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c24d0ddd4113746…

MALICIOUS

PDF

42.9 KB Created: 2020-08-31 16:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c8e760831c912fb45ff91a88d56d32f4 SHA-1: 6008fdd7bad15446611779c612560c549ab5d33b SHA-256: 3c24d0ddd4113746972cc0c1c33fbac81d734d37b9ff111f7de12b7e593898fc
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.ru/wix?keyword=avatar+the+last+airbender+game+file 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/b8c837_634d425dce084fbb89144d1740260d3d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c1615c_85cacc7bb1934ca99027ba0626cdc551.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3aca14_abfed0cb943a404387440f4e254a337b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6146/9599/files/rumifewixoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38746106010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/digopav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7263/2470/files/bill_lumberg_quotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/bozezezijoxurotiwanuz.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_fa43d1a18dd641ab8843f3894462de78.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fd7405_c476bf50b5724663ab0678f8e5a846d4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3e87bf_f309b54f61d94369bb5d6dadfcf4cc7e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_68a0f57776cd4fff9c020f98b8c7fc41.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_c3f3873bd5d94985827907ad64daa3e0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8427/4069/files/bakeshop_business_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/64587931603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/segavedifure.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_off000068ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68ED 5508 bytes
SHA-256: 4cf0dc4e0dc07a695d868be0f213fb7fb2bd39a9bf130b7cee4c4844ed1bfe2b
font_01_sfnt_off00007b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B83 10300 bytes
SHA-256: 233f1c160fbab1022c04c8a2342332b882f2022b970a48327004b1542e66af49

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