Malicious PDF — malware analysis report

Static analysis result for SHA-256 875215933de1d28c…

MALICIOUS

PDF

44.7 KB Created: 2020-09-02 20:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f499c24b60057c72a032c1329c04cbb SHA-1: 11d4fead9c30c385ac3c260773ce36bc79fcd2e0 SHA-256: 875215933de1d28c3e4b1fc9ed2a1ca0f4ae34398f1f9ed370dbd963ebff685f
120 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to external PDFs. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.me). The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure for a PDF download.

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.me/wix?keyword=utilitarianism+by+john+stuart+mill+pdf
    • https://static.usrfiles.com/ugd/362633_d245be8523d14df7b6cdc4d79c305cd0.pdf
    • https://static.usrfiles.com/ugd/fc840b_56be70a9a8fd4c599823a3e51bd14d8c.pdf
    • https://static.usrfiles.com/ugd/b8c837_41c7eab4ce414a78804d6f99c1bdfc73.pdf
    • https://static.usrfiles.com/ugd/516793_680c099b5701480cb4f6ea3b00bc89c8.pdf
    • https://cdn.shopify.com/s/files/1/0432/6182/1092/files/alphabet_letter_practice_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/5212/1762/files/kali_source_list.pdf
    • https://cdn.shopify.com/s/files/1/0437/3420/4568/files/48215342498.pdf
    • https://cdn.shopify.com/s/files/1/0440/0798/1214/files/call_of_duty_mobile_ios_link.pdf
    • https://cdn.shopify.com/s/files/1/0435/4654/2229/files/79839637207.pdf
    • https://static.usrfiles.com/ugd/4b7290_635f35e61d604b0e874864cae719ea02.pdf
    • https://static.usrfiles.com/ugd/81ef4b_aa967318af18469186cf010c6dbb2fa3.pdf
    • https://static.usrfiles.com/ugd/b8c837_927c2bf494ff478d8ebdfe818e39c2e7.pdf
    • https://static.usrfiles.com/ugd/96768c_0b4722a7bd5b4b80a8d8add20216ab00.pdf
    • https://static.usrfiles.com/ugd/c5d40f_d21d3f40ab6d4e57a80f7a217536a0eb.pdf
    • https://static.usrfiles.com/ugd/fdee49_d6571502767d4531a8d3f0522851cdda.pdf
    • https://static.usrfiles.com/ugd/8b2c09_555dab174d9149f9b6eb67fb948ca3bf.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_60f6475c1576422984eb31f40a24ff0e.pdf
    • https://static.usrfiles.com/ugd/d162e3_662e798f198c4ed8a055e79147518a18.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_off0000707f.bin
24ad9d08d8570e5ff833162f8158741b6576956faa993fed2e1f770f54901947		 pdf-font-stream PDF embedded font (sfnt) at offset 0x707F 5592 bytes
font_01_sfnt_off00008360.bin
5d24947447e365ebe919c0f508586da577c604f477813c7b0e366a1003748eba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8360 10112 bytes

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