Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b4162ee566c34c…

MALICIOUS

PDF

47.2 KB Created: 2020-08-30 00:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd6e129be984a2ef0cdd6217257ea156 SHA-1: 070fb6d0bb8adb2b5a0a6bd1a0623b584a994b39 SHA-256: 02b4162ee566c34c1e008013e5c44245b38f264cf295aed68158c1d5ff3197ee
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure related to financial account details, specifically mentioning 'Wells Fargo account nickname'. It embeds a link to a known malicious redirector, ttraff.ru, which is designed to lead users to malicious content. The PDF also contains a large number of links to Shopify-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, and the SE_PAYMENT_REDIRECT_LURE heuristic confirms the social engineering aspect.

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.
  • 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.ru/wix?keyword=wells+fargo+account+nickname
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2128/7080/files/95065134684.pdf
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/19450214238.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/fugevos.pdf
    • https://cdn.shopify.com/s/files/1/0438/5079/3110/files/26537276258.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/summoning_guide_2017.pdf
    • https://cdn.shopify.com/s/files/1/0452/4458/0002/files/how_to_write_a_book_review_for_school.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5616/files/suzimokagapejofenejipisil.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4449/files/mutikomaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/fiwizogijuga.pdf
    • https://static.usrfiles.com/ugd/89064d_c0e9970f19dc47f98ac1389a8b3efe18.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_7813e1b478b24e8da97f398bcde350fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbf61614925c45b59beeea5a0c209236.pdf
    • https://static.usrfiles.com/ugd/9c0842_13b199aac4ce43429b41e27d49cdffc8.pdf
    • https://static.usrfiles.com/ugd/b8c837_e036c0224e99419488018ef3f52f9593.pdf
    • https://static.usrfiles.com/ugd/a43ec6_20e4ead2d63d41eb841d98642586563a.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b30.bin
01c5b4dec1b4f4b29b41872d1db838bc9fece4165f1b7e915aa196326f5b8349		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B30 5276 bytes
font_01_sfnt_off00008d1a.bin
50ab91d7c024137f2f1747d7320930178a027cd2d9d5a36bc721ab19e85cef54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1A 10252 bytes

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