Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68b15076a72b7a7…

MALICIOUS

PDF

40.9 KB Created: 2020-08-31 02:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d2b5a4ae5bda719fbec3151ab528e88 SHA-1: a85f96d835a15a10772e281d77d7f8f29f5cdb0d SHA-256: b68b15076a72b7a758c3993885481fe20d2d62ad51c53193c11dad1ebcf02672
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.me/wix?keyword=little+brown+jug+sheet+music+glenn+m, which is flagged as a malicious redirector. The presence of numerous links, many pointing to static.usrfiles.com, suggests a link farm or SEO poisoning attempt to drive traffic to the malicious URL.

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=little+brown+jug+sheet+music+glenn+m
    • https://static.usrfiles.com/ugd/b8c837_0444f4670e5641759cd886d5c46e78c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_e36b7e4a920346da937485d9921a63db.pdf
    • https://static.usrfiles.com/ugd/cd79e3_1911cbb5a30144deb9595603d3c7dc72.pdf
    • https://static.usrfiles.com/ugd/b8c837_2db488a7fe6540bab5e45ad1efd8d673.pdf
    • https://static.usrfiles.com/ugd/eda9ba_0390cf0f9ff44a4f9012daab8cdfc100.pdf
    • https://cdn.shopify.com/s/files/1/0437/0179/7019/files/loleviwalozoxamogubokeg.pdf
    • https://static.usrfiles.com/ugd/aef5b7_ea300219a8a84aafa9640990278146b2.pdf
    • https://static.usrfiles.com/ugd/77eba6_eaa07686bcdc4fec9fba4f20815c9c03.pdf
    • https://static.usrfiles.com/ugd/49be48_6692efb7b4c24de78cf7b336976fc2e6.pdf
    • https://static.usrfiles.com/ugd/6924eb_f7af0d6cad4b458d84f7dbd2d51ecb22.pdf
    • https://cdn.shopify.com/s/files/1/0433/7297/0133/files/pudosabugunizoperijupo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tolipokegegami.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/hadzic_anestesia_regional.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_off00006149.bin
ded767f3c168983304e604eecabc934f5f3789388ffacec63d993bf63591bdf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6149 5252 bytes
font_01_sfnt_off00007314.bin
9121f53a0b08eb36a78d1684d92b60d3e66ffde0a810779af642115f0b94b6e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7314 10472 bytes

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