Malicious PDF — malware analysis report

Static analysis result for SHA-256 88210a87783900a8…

MALICIOUS

PDF

45.6 KB Created: 2020-08-30 11:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64d80fabe73499b87d6a75909751565e SHA-1: 4b55bb3d0355923061f90d88702839d3853e1f10 SHA-256: 88210a87783900a8be74214fffc23dde855302de9a9cf171b2f79fa21d6acfb7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=caracteristicas+de+aprendizaje+visual'. This URL is likely used to direct users to malicious content. The document body, though heavily obfuscated, contains the same URL, reinforcing its role in the attack. The file also exhibits characteristics of a link farm, with numerous embedded URLs, suggesting a broader campaign to distribute malicious content.

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.com/wix?keyword=caracteristicas+de+aprendizaje+visual
    • https://static.usrfiles.com/ugd/b98abb_c095d44afa2947409fefee7a59d6f4f3.pdf
    • https://static.usrfiles.com/ugd/5cf23b_556769a44cec4299b3d041cc08325115.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_a14132c62377426797a22d88d6b30593.pdf
    • https://static.usrfiles.com/ugd/b8c837_fae17ae0c622442c8a7a99995f1026ea.pdf
    • https://static.usrfiles.com/ugd/e4ff69_37041297933747c09e2791d15b88ea21.pdf
    • https://cdn.shopify.com/s/files/1/0433/0343/6446/files/49246148481.pdf
    • https://cdn.shopify.com/s/files/1/0434/0029/8648/files/contemplate_about_oneself.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/80336345029.pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/relunafasibokomolifevuliw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zogubarekerebadopotuleju.pdf
    • https://static.usrfiles.com/ugd/1be480_7fd68e72828a4fbbaf0db04187807531.pdf
    • https://static.usrfiles.com/ugd/fe83c3_d6c3f15fb7fb45718eb25a3e56eb6145.pdf
    • https://static.usrfiles.com/ugd/516793_086cce742d4844bebd14497ae433dcc8.pdf
    • https://cdn.shopify.com/s/files/1/0439/2180/1371/files/delicious_emily_series_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/8361/9738/files/motutebet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1848/4885/files/all_information_about_maharashtra_state.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_off000070e6.bin
d20e0ff894873fab331fa1def37ea453dc2e79ee61d60ada58722fe2d2add954		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E6 5156 bytes
font_01_sfnt_off0000828c.bin
25eed1cd4f1e866a193678510fe5d9ff5941621a95fe5dd47c68a106fc8bbcb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x828C 11388 bytes

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