Malicious PDF — malware analysis report

Static analysis result for SHA-256 65963a1bdcc6dfe3…

MALICIOUS

PDF

46.3 KB Created: 2020-09-03 15:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91e78a10cdf9db43e4cd22ca40f046d6 SHA-1: b930928d023a1ff0251b23370586158fbf06870b SHA-256: 65963a1bdcc6dfe3a2c6014f82457b28b4a05090c01af135b371b46bcda90925
162 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, disguised as a download for 'Call of Duty 4 Modern Warfare APK'. The PDF also contains a large number of links to external PDFs, likely for SEO manipulation or to host further malicious content. The ML classifier strongly flagged this PDF as malicious.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=call+of+duty+4+modern+warfare+apk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3f0e57_129a9f21285840da8d32a626d85b717f.pdf
    • https://static.usrfiles.com/ugd/edb4a7_f478dd4fbf3b4e66a8eaa2f8150f6e9f.pdf
    • https://static.usrfiles.com/ugd/b81754_9f8d0fc0503f4d83afd081975b78e9eb.pdf
    • https://static.usrfiles.com/ugd/c46c8a_c2f9dbea934b4a6ab1bd1e4913143b81.pdf
    • https://static.usrfiles.com/ugd/866690_a99c1a59fc114675a6c9956a09956d32.pdf
    • https://static.usrfiles.com/ugd/3e9e83_c4fda368bf014d25999fa858ac5aef5c.pdf
    • https://static.usrfiles.com/ugd/19103d_9db8b030826547b6b1aa4d87737228b0.pdf
    • https://static.usrfiles.com/ugd/87a178_6cba9c37c9764b869f2944de3ceb9f93.pdf
    • https://static.usrfiles.com/ugd/9c66ff_be0b049e006c4f0f8afd1d109228e918.pdf
    • https://static.usrfiles.com/ugd/d3758e_bc42a9b3d51b446db4a507ff5bcc23e0.pdf
    • https://static.usrfiles.com/ugd/934fc3_070da900b88b4779a96337f87fac461c.pdf
    • https://static.usrfiles.com/ugd/edb4a7_0b07d2e818ac4de1b408743b240f3a49.pdf
    • https://static.usrfiles.com/ugd/83d902_fb3c966bc5a94aba8b89e000801a8c60.pdf
    • https://cdn.shopify.com/s/files/1/0462/5301/5189/files/11560047591.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6390/files/8735829397.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/sarvottam_stotra_lyrics.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_off0000622c.bin
ee81de8795021de48fcab28b8a26ca8bc9f4dd7339fa9b977d7d8274ca08ffa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622C 5260 bytes
font_01_sfnt_off0000741b.bin
a630243d6f080fc1e97693369fcebe119a53074fdc003d1e64fa9636e569bf2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x741B 10164 bytes
font_02_sfnt_off00009710.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9710 16092 bytes

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