Malicious PDF — malware analysis report

Static analysis result for SHA-256 e19e24a0e47fa3d6…

MALICIOUS

PDF

64.8 KB Created: 2020-08-29 18:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57b413bdcb895e2845eb87eeff7f5ddc SHA-1: 0d98ab8c7473fc49e5982c85355ca3ef34091843 SHA-256: e19e24a0e47fa3d6241505ba4340cc9a0af9d06737bb2b0d72e9d0b4224da85f
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 large number of embedded links, characteristic of a link farm or SEO spam campaign. One of the primary links, https://ttraff.ru/wix?keyword=volumetria+de+precipita%25C3%25A7%25C3%25A3o+exercicios, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent.

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=volumetria+de+precipita%25C3%25A7%25C3%25A3o+exercicios
    • https://static.usrfiles.com/ugd/374ce0_e51d1adb7ed94ea98204fd0c526a039a.pdf
    • https://static.usrfiles.com/ugd/12f4eb_f907bc00439e4f8d821af4a5e9f7e148.pdf
    • https://static.usrfiles.com/ugd/b8c837_addb9fa3073e4f5f83a82566d5c84c1a.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_e59822a349424e4493cd818eae24d2b8.pdf
    • https://cdn.shopify.com/s/files/1/0434/5698/7303/files/46918047097.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/22250314508.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2813/files/31056369876.pdf
    • https://cdn.shopify.com/s/files/1/0437/8342/2109/files/discuss_kubla_khan_as_an_allegorical_poem.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d93da4b6e9e4bac8ba8ce9981073a82.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbbfd0603f3e4887bbdb92b5c4ab1d31.pdf
    • https://cdn.shopify.com/s/files/1/0432/3485/3021/files/xolovosowezifafute.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7925/files/69655946761.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_off0000aec3.bin
a47f0dee39c06c3f621a87446aaae5c80d5b042046b83611e1a3124b02c208be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC3 5752 bytes
font_01_sfnt_off0000c167.bin
8d78aa107c6971ff9ef46d68a80de7a8b4c15ff8af235723bbe12e273f9ab108		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC167 17336 bytes

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