Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbe745632d22a31…

MALICIOUS

PDF

38.6 KB Created: 2020-08-29 14:12:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60ea00ba0349cb80f8cc3e4d1cf86f17 SHA-1: fb5a0c52c56778ed62768613967d4a851a377ffd SHA-256: fdbe745632d22a317d9e7662174677b54e3cb9091565034f7cb82454ce94f20a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of the primary links, however, directs to a known malicious redirector at ttraff.cc. This suggests a social engineering attack designed to lead the user to malicious content. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=sarali+varisai+pdf
    • https://static.usrfiles.com/ugd/b8c837_c02f80ebf58c47f5a7dda6f58f20754d.pdf
    • https://static.usrfiles.com/ugd/b8c837_af05412463db4ea1863235083310c7d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a9b6addf85d406991ff5373942b9206.pdf
    • https://static.usrfiles.com/ugd/b8c837_1bbad9c8a3194167a5ba6c559356eb84.pdf
    • https://static.usrfiles.com/ugd/704566_f1f8dca359814c10a3ac5dad8dc7d313.pdf
    • https://static.usrfiles.com/ugd/b8c837_026f840908d74eab9d7d60ded1dfcd08.pdf
    • https://cdn.shopify.com/s/files/1/0460/5617/7819/files/28220560122.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6909/files/bupowupo.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f15cece40b245d68ae428b28317248d.pdf
    • https://static.usrfiles.com/ugd/b8c837_74a5ce99115d458bb9fffb5bc40a766f.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004479.bin
d848dc7fe75f3e1364a99ba9007b1ce1f8ce50fd05c1868652b02acd8b8b6e09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4479 4572 bytes
font_01_sfnt_off000053fc.bin
dc8472fdd4d464d70795537648e0fe9e12b99843b0065ad51636b0f2a297c19e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53FC 13224 bytes
font_02_sfnt_off00007dcd.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCD 4324 bytes

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