Malicious PDF — malware analysis report

Static analysis result for SHA-256 763eeddf76f0fd74…

MALICIOUS

PDF

48.5 KB Created: 2020-08-31 05:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f8287e6423af963a521f06a7de94c70 SHA-1: 1d02936a1835bc7ab149b2422740cbf32126f5f5 SHA-256: 763eeddf76f0fd74712fd7bc34cbd115eeaeb588a3b6b5e7b6a091e42ad0261b
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to movie downloads, suggesting a social engineering lure. The ML classifier also 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.ru/wix?keyword=tiranga+hindi+movie+download+720p
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_57c1918b72a2493d8bbad3dacda34398.pdf
    • https://static.usrfiles.com/ugd/e5a943_d2f6719f49914b62a20d1c1cf85c21dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ae4f811cf4746fdb013b52745dcf53f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6666bf03ee0493fb4b4ca5e2b13e010.pdf
    • https://static.usrfiles.com/ugd/696b8a_3a010f4f9eca44f5bb5706b189b5646a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b02aa0ade46f4f23bf2127895aa77f3b.pdf
    • https://static.usrfiles.com/ugd/df4650_8832c04510f64346b057e0a77a9852a8.pdf
    • https://static.usrfiles.com/ugd/29c71c_750941d2d8ee4545b2310d27e996354e.pdf
    • https://static.usrfiles.com/ugd/3b7182_cc3c166f82594ffab84e5698739ed9fb.pdf
    • https://static.usrfiles.com/ugd/69b86f_47e3971ca7b7406bb832794d58cb47a1.pdf
    • https://static.usrfiles.com/ugd/0bcf16_b54ee58feb724c2eab52b97bc0979925.pdf
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/1554637285.pdf
    • https://cdn.shopify.com/s/files/1/0437/0395/9720/files/gixawikaroxuparobutepufo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/91586771520.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069a4.bin
e165f99d83aafc4cc6c5241859121d0ad8d15af870e933aab7542434e01e4e01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69A4 5648 bytes
font_01_sfnt_off00007cc7.bin
532d3bf4af25fdd382f1d4ce9d6b8a96307711f4d0c2be45982afec7a60101b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC7 10068 bytes
font_02_sfnt_off00009f53.bin
4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F53 16164 bytes

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