Malicious PDF — malware analysis report

Static analysis result for SHA-256 5315c26a6fe8a125…

MALICIOUS

PDF

35.2 KB Created: 2020-08-29 20:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6999f9d42c6aaad53458db7f3041f862 SHA-1: a88ba4e04d5ff423645494ba2291a49ee7c2d461 SHA-256: 5315c26a6fe8a1253588e32c3bb7269a0377bbe1c9d841fd277d5f2b04be29c4
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 external PDF files, characteristic of a link farm. One of the primary links directs to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to "Mulan sheet music pdf", which is likely intended to entice users to click the malicious links.

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.ru/wix?keyword=mulan+sheet+music+pdf
    • https://static.usrfiles.com/ugd/cbe7f7_a871c27680bc430c89bdc8ad5f72a18b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b41ed9564edc49e481e31d1d9dac9b30.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9d61f3c877047819d0cc5945c95a88d.pdf
    • https://cdn.shopify.com/s/files/1/0428/9665/4489/files/beat_saber_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/pocket_style_manual_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/5252/3929/files/76651913707.pdf
    • https://cdn.shopify.com/s/files/1/0461/6506/5891/files/45076586385.pdf
    • https://cdn.shopify.com/s/files/1/0433/8761/7436/files/debenhams_egyptian_cotton_flat_sheet.pdf
    • https://static.usrfiles.com/ugd/b8c837_18669815a9c24adca17dfa537faffc0d.pdf
    • https://static.usrfiles.com/ugd/b5472a_58625fc22428455285b9c4fc0a8971b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_16bf48bd082c452bb919ec2e4d5c69ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_2cfb218e1ffc4994b0766b8577d79656.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9d89722f75f483983a8e7d72e5640f8.pdf
    • https://static.usrfiles.com/ugd/fd7405_3d61946bdacb4d0f9e7df4e386150154.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d4524433bcc421e9814eef27954b225.pdf
    • https://static.usrfiles.com/ugd/b8c837_11a53feb3f1d4891977363a9b9ba0a44.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bbf.bin
c0111f85cf5f90ef961d187b90489f108109657923dd887e3ff24aaffb8ad659		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BBF 5304 bytes
font_01_sfnt_off00005da5.bin
d9ba2380f0098b44756015e4d5bcb03461157920be9b173db9b42a7c92928abe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA5 10144 bytes

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