Malicious PDF — malware analysis report

Static analysis result for SHA-256 87c67894d8a162d5…

MALICIOUS

PDF

43.5 KB Created: 2020-08-29 01:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90a87fa257eff633d28be1bc623e32ae SHA-1: 78a2d5377c51b2fc2fa97bac0135bc9551493ef9 SHA-256: 87c67894d8a162d585097540aaede1228a3c97b22e58bfedf5c8eeda0b535abb
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=cartoon+drawing+tutorials'. This URL is presented within the document body, disguised with a keyword related to drawing tutorials, indicating a social engineering lure. The file also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. No scripts were extracted from this sample.

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.cc/wix?keyword=cartoon+drawing+tutorials
    • https://static.usrfiles.com/ugd/b8c837_5f878df0ea8b4a448d5abcb9aa01e1cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_0725ec1cacfc4d5fa647dcaf7a2bfee7.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cb7a68ba40f40898af76c2d6bd1c429.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ed0ba18c90e475f9d691b6fc8be1315.pdf
    • https://static.usrfiles.com/ugd/b8c837_03fabe0c4f734b85b60c8473cbeac064.pdf
    • https://static.usrfiles.com/ugd/b8c837_b22c3e83a6d040c882ba970a9c4e24dd.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/bikini_body_guide_workout.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/asl_alphabet_printable.pdf
    • https://cdn.shopify.com/s/files/1/0430/0996/6239/files/kafig.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/87436365128.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f958df7d2094f449ef003b46a93c0b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_ceefa6617de046cab9af5e0a9b652215.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_off0000606d.bin
fbd60e3a6db8b903ff0f40fcc0c1edece24769c28b79928439691bdb5439f881		 pdf-font-stream PDF embedded font (sfnt) at offset 0x606D 4872 bytes
font_01_sfnt_off00007110.bin
4c4d25bee5e5316fe5a970d398c43eeb03d691dfd3f275d909d01aee59b8ac39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7110 9976 bytes
font_02_sfnt_off00009344.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9344 4324 bytes

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