Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ca244dde9a7cb9…

MALICIOUS

PDF

45.7 KB Created: 2020-08-31 21:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6df56fece07c3825cde5071e38f55578 SHA-1: 7e224c66f07ba225d33dc75a197d7b1c230e66d1 SHA-256: 14ca244dde9a7cb9dd56d43069ffaaa99fbe862103eec57e112299c8e153625c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://ttraff.cc/wix?keyword=autonomous+vehicle+disengagement+reports+2016', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating an attempt to lure the user to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious.

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.
  • 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.
  • 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.cc/wix?keyword=autonomous+vehicle+disengagement+reports+2016
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_02aa42f81d644e0993de17950c2cb1a6.pdf
    • https://static.usrfiles.com/ugd/7baf93_902dddfac8cd43f1a3edfb0c00f1e30a.pdf
    • https://static.usrfiles.com/ugd/b6edda_7ff2c97d157f4f2aa7913ff98af52f04.pdf
    • https://static.usrfiles.com/ugd/738632_c1255d1e09ca4aa1b2944733ae6e09b8.pdf
    • https://cdn.shopify.com/s/files/1/0448/6198/0834/files/94708406695.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/18392159834.pdf
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/92188933564.pdf
    • https://cdn.shopify.com/s/files/1/0433/8938/6901/files/gidojesotajobazuzoxobogi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/16429181203.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/76273905625.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lubogalevomiwubojaxijafax.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/john_deere_s240_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/jixogivavoxokibefepikuwew.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5953/files/3946232276.pdf
    • https://static.usrfiles.com/ugd/b8c837_6212f1430b58437d84a577fc1e1c08ef.pdf
    • https://static.usrfiles.com/ugd/b5472a_a3c7f55f7c054398b857415e34c7ade8.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_off00007169.bin
e9c93bd76c4531fc1d670ec0ffe39ab2b5bcc8fc6e8e791aaa8a3e64cc13fd85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7169 6016 bytes
font_01_sfnt_off000085c5.bin
308360750da28a4b459bb5047bddd938f306c4b00607fb93acdc0ca38a109633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85C5 10568 bytes

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