Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c551e9906f2760…

MALICIOUS

PDF

33.1 KB Created: 2020-08-30 16:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e26380be19d41e5daf8544a96e858121 SHA-1: 02b6ce58ecc2864b4e762a3a5671f553587908d3 SHA-256: 93c551e9906f2760a3ae1a4b005cd3ca5d68580ad48c54aa5122b8004374c297
130 Risk Score

Malware Insights

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

The PDF file contains a mass external PDF link farm, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a title ('High school of succubus') and a URL, suggesting a lure. The presence of a 'download button' heuristic further supports a social engineering attack pattern. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.
  • 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
  • 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=high+school+of+succubus
    • https://static.usrfiles.com/ugd/7041e4_c307e4922caa4b5383f3dc3322587eed.pdf
    • https://static.usrfiles.com/ugd/b8c837_556755e53ee94a618e73870010bf5403.pdf
    • https://static.usrfiles.com/ugd/7ff653_d19259f0f5cf488eae51264eea3ef3fc.pdf
    • https://static.usrfiles.com/ugd/1be480_54ef447a4d4b44d282c7169d431b4b5c.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/sad_heart_broken_wallpaper.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a144960a525420684dbeacbb8ec8792.pdf
    • https://static.usrfiles.com/ugd/b8c837_20112825a67444488be804422d35c2d6.pdf
    • https://static.usrfiles.com/ugd/8b49c6_cea1570ec3b8472296d9b1dba18366ae.pdf
    • https://static.usrfiles.com/ugd/a298ce_2d17dd7c5c23436ab7d45c253d5b2fe4.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_off00004417.bin
460d2bf955ef9619ebf257fc9bad38b43ec3b5caacf1137d6c907dfc883b401b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4417 4936 bytes
font_01_sfnt_off000054e7.bin
30ca138036f6745dccbbee2952ddfdb105aab952e84b875d1705c7a38f23be1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E7 10448 bytes

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