Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7148890f9be7b7a…

MALICIOUS

PDF

41.7 KB Created: 2020-08-29 23:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7aef96779ca9b66b1ad29da7535989e3 SHA-1: f08950496ad49f74af48261d9960beb1fd899607 SHA-256: a7148890f9be7b7a6f81d354bb16f29087db6bf7c449eb369aca12160efe4f4c
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 the presence of a link farm containing numerous external links. One of these links, 'https://ttraff.ru/wix?keyword=idiograma+humano+normal', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the redirector.

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=idiograma+humano+normal
    • https://static.usrfiles.com/ugd/b8c837_68d82d63751d4673a654b89ed94a7141.pdf
    • https://static.usrfiles.com/ugd/b8c837_2803fc05dab84343b08fa42b98065201.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf551a7e46aa44c3a958e961fa977820.pdf
    • https://static.usrfiles.com/ugd/384ea4_9161773382814ee69c96fa884d0c9417.pdf
    • https://static.usrfiles.com/ugd/b8c837_d920c46c2f204f7398cc97e4174d14d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c3c160e5c1d469b872d8c9c1bf152c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0ebfcabce4c4cf0a162a5a8fcf1f344.pdf
    • https://static.usrfiles.com/ugd/b8c837_57c7de3b0d364c1fbf8deb0b00ac6e9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_258a96fa30bd41219800a6511a5ec1bc.pdf
    • https://cdn.shopify.com/s/files/1/0437/7044/5982/files/29177901264.pdf
    • https://cdn.shopify.com/s/files/1/0431/7010/3452/files/22190721808.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_off000059a0.bin
5460107d665db30c791dae13f2dd414ff60addc7b32ea985fd24cafa489a5b4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A0 4684 bytes
font_01_sfnt_off00006947.bin
2cef320f6a2a5254bbad64ee4475845a0a0244e64d279c108d943dafdc78763a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6947 10372 bytes
font_02_sfnt_off00008c76.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C76 4324 bytes

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