Malicious PDF — malware analysis report

Static analysis result for SHA-256 57210df28346c389…

MALICIOUS

PDF

57.6 KB Created: 2020-08-31 00:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 851499250e7e5839d961df063d64dbb3 SHA-1: b4d855324264a0d08352df489476089e6267bbb2 SHA-256: 57210df28346c3891b251c0bc01c8b6c450757099cccc5a78826d3bcc94448be
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its structure, which includes a large number of embedded links. One of these links, 'https://ttraff.ru/wix?keyword=actividades+en+el+castillo+de+chapul', points to known malicious redirector infrastructure. The file also contains a link farm with numerous external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted, and the document body was heavily obfuscated.

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=actividades+en+el+castillo+de+chapul
    • https://static.usrfiles.com/ugd/65b209_47bb23bd732d46f08e83aa69f788ab09.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd9d5ca1546f425fb01233295b19e73b.pdf
    • https://static.usrfiles.com/ugd/b8c837_495b255cf0bb4d7cac6070c91c4eddff.pdf
    • https://static.usrfiles.com/ugd/fa6f14_dc826e7c31f34adb9198d17315c336f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c315e1065d446e2ae67cf8361e2fa41.pdf
    • https://static.usrfiles.com/ugd/b8c837_545b203e077f4949b197755b78cd63af.pdf
    • https://static.usrfiles.com/ugd/b8c837_98cd7f61adbf4dd3a33e90340b305af8.pdf
    • https://static.usrfiles.com/ugd/cc14e4_a2d852ad61cb4329b961fbb93a93d79a.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_bc8b80bf04784532b20206f7b3b104df.pdf
    • https://static.usrfiles.com/ugd/b8c837_657f591d17b945b486d7ac5fd71ae535.pdf
    • https://static.usrfiles.com/ugd/fd3290_a8fc826d74ae497cb10c2b0f12c14c87.pdf
    • https://static.usrfiles.com/ugd/b9801a_3aa11121f27342ea89d8c0f32863027f.pdf
    • https://static.usrfiles.com/ugd/b8c837_f28915aefff245bcae49073376a60597.pdf
    • https://static.usrfiles.com/ugd/b8c837_8346e753212544c4a081fe7a97d82b1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d43729fe8a844fb998c967e8a585d748.pdf
    • https://static.usrfiles.com/ugd/49be48_547626794e5045b5915f92b3e9fc8a4a.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_52fef4b6a00e497093ab06ddf6380a27.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdf2f87b1ad24e158f538882c5727b89.pdf
    • https://static.usrfiles.com/ugd/55f640_74e67d8e9c3644b59a235781dc2d980f.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_9529c5ba8ec74802b06dee7b4794bcb9.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c82.bin
7f0e1f44ddbc8ec6e33260db7f4696f27aefa3350d8c8849faa0da6bbe1b09fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C82 6720 bytes
font_01_sfnt_off00009302.bin
8ef62a730e893e141edfa1aedfbaed615d662ccfa261ec67d6433fb66b829d0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9302 4996 bytes
font_02_sfnt_off0000a3f4.bin
c3769f88b48e7baa8f3fcf452e2ce6e32521ebe0b38d932a908fc3ee8dd7f065		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3F4 11424 bytes
font_03_sfnt_off0000c8d0.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D0 4324 bytes

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