Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8736c9614734e9…

MALICIOUS

PDF

48.7 KB Created: 2020-08-31 05:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ecc302c39a948fbff53a94ab12d8eb5 SHA-1: 6f93bb1dd93ba5035d2cf2746e298ec42a6dfc75 SHA-256: de8736c9614734e94bdb436428bc61f18ffb74293fe6a6a12b0429d33e4c33d5
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.cc/wix?keyword=financial+peace+university+workbook+2016+pdf`. This URL is embedded within the document body, suggesting a social engineering lure to trick the user into clicking it. The file also contains a PDF link farm heuristic, indicating a large number of outbound links, many of which point to `static.usrfiles.com`. The primary malicious URL is the most critical IOC.

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=financial+peace+university+workbook+2016+pdf
    • https://static.usrfiles.com/ugd/b8c837_7ba4341834854133b752abcf4036585c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e61ca8ca5bbe4d16a1c09b3faeaadb92.pdf
    • https://static.usrfiles.com/ugd/b8c837_13cec9d0f67f43a7acac605aaaaa5d1e.pdf
    • https://static.usrfiles.com/ugd/769f78_82fb3f2eb5c347cfbfb70e8db47a8113.pdf
    • https://static.usrfiles.com/ugd/f8de3e_a534499769fb4c8789c61f973358ff04.pdf
    • https://static.usrfiles.com/ugd/8de238_30f894b4296c43579cb5a0fe739e69df.pdf
    • https://static.usrfiles.com/ugd/b8c837_95d3cb5d56764b24be6e54d0e39ab094.pdf
    • https://static.usrfiles.com/ugd/c345b0_cab5f13d5c14498ea891c76b792eb974.pdf
    • https://cdn.shopify.com/s/files/1/0432/2459/6642/files/36390347420.pdf
    • https://cdn.shopify.com/s/files/1/0435/1488/8360/files/kivilix.pdf
    • https://cdn.shopify.com/s/files/1/0459/8343/2866/files/minecraft_guide_to_farming_book_big_w.pdf
    • https://cdn.shopify.com/s/files/1/0432/1784/6427/files/60480386689.pdf
    • https://static.usrfiles.com/ugd/850f07_8a6f80b5400e4c1dab47c83f7de927be.pdf
    • https://static.usrfiles.com/ugd/eda9ba_8006a807b78c418997f606637f00abe6.pdf
    • https://static.usrfiles.com/ugd/d162e3_498b2d5b6935419286ee21ffa63c6e83.pdf
    • https://static.usrfiles.com/ugd/05900a_e94d0d2b222f4a2497a9da02a074a56a.pdf
    • https://static.usrfiles.com/ugd/d4a9d6_a35611fcdb5d411e926fbf739b1827d1.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_off00006e8f.bin
3b83b3916b9de9de8a2a8b145dd36eae97afb39c0ef2c4210c130c042aaa1b68
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8F 5924 bytes
font_01_sfnt_off000082d6.bin
f2808cd1cbdd046af3b05a567f9804b912ce4c57ccb57ac0d76650a349071947
pdf-font-stream PDF embedded font (sfnt) at offset 0x82D6 10992 bytes
font_02_sfnt_off0000a7a6.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7A6 4324 bytes