Malicious PDF — malware analysis report

Static analysis result for SHA-256 bca4ec799697e9b7…

MALICIOUS

PDF

43.7 KB Created: 2020-08-29 00:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 568dfc95c80aebe6569e79533bfea927 SHA-1: ca2901385d93fff595ae2ca2b6e7d9da256d46fc SHA-256: bca4ec799697e9b7269cb7997ced49dd8fdcd31e2221f348aa1fee44e2cb9092
120 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. The primary malicious link identified is https://ttraff.ru/wix?keyword=the+core+competence+of+the+corporation+pdf, which is flagged as a known malicious redirector. The document body itself is heavily obfuscated and appears to be generated content, further supporting the malicious intent of driving traffic to external sites.

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=the+core+competence+of+the+corporation+pdf
    • https://static.usrfiles.com/ugd/b8c837_1a36d9949354433ca8684a5763695c9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_439cb3377941494f903a4dad124ae329.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8c3f96b8e13470b834a4425a36cae95.pdf
    • https://cdn.shopify.com/s/files/1/0432/1850/1799/files/41315084233.pdf
    • https://static.usrfiles.com/ugd/b8c837_344c2116375244afbd20eac82e2cce46.pdf
    • https://static.usrfiles.com/ugd/b8c837_344215e993c5403eb9505e7d16cfb44e.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb891bbb6299400c902f166c78465094.pdf
    • https://static.usrfiles.com/ugd/b8c837_1120cf36c456447ea4535e950cd98174.pdf
    • https://static.usrfiles.com/ugd/b8c837_3419f3088ce24bba9636b245ef43c476.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e32c33576144ae6bc827d11eab69f72.pdf
    • https://static.usrfiles.com/ugd/b8c837_f67df672cd824cac8ab189471f21bafd.pdf
    • https://static.usrfiles.com/ugd/b8c837_70c57db51c4244df93590711178b9b6b.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_off00006dbe.bin
c3e0fa0ce39a92e6b928ffa32cd487def5964df0d4f6eefc764d801212eca262		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBE 5136 bytes
font_01_sfnt_off00007f05.bin
06338564c7d11b60cdd49c95e9d8676d2d3f5452e44d83697d03476d15e16660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F05 10116 bytes

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