Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0793cb18cc6d9c5…

MALICIOUS

PDF

52.8 KB Created: 2020-08-30 03:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c24d982d8e1eb22d260a90d7a7820b4 SHA-1: 7d56dd4bfa5a9012e11ec243bc12dbcc245bf933 SHA-256: c0793cb18cc6d9c5eafdeb4641cfa269c37b1cf94745b431a1902b0c49c82b2a
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/wix?keyword=glion+dolly+foldable+commuter+electric+scooter`. This URL is presented within the document body, disguised as a product link. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing 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=glion+dolly+foldable+commuter+electric+scooter
    • https://static.usrfiles.com/ugd/fe83c3_4fa8ebc44e144978a9ff2e239d0a6b3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4da3ffdcee642888a3fc7f9e5522a66.pdf
    • https://static.usrfiles.com/ugd/b8c837_d967a99cd044451d89a542901f258b04.pdf
    • https://static.usrfiles.com/ugd/b8c837_29761a4f13a847ff9d8959fd0521ee1f.pdf
    • https://static.usrfiles.com/ugd/6908d7_c09e71e1b6d542a19c7fb1a8dec86e33.pdf
    • https://cdn.shopify.com/s/files/1/0434/0842/5123/files/bbs_2rd_year_result_2075_with_marksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/serowodekeba.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/49604452803.pdf
    • https://static.usrfiles.com/ugd/b8c837_31abda09386c4690a9519d8b20c6ffb2.pdf
    • https://static.usrfiles.com/ugd/89064d_1d6a86bb4e8a4a5db5d460575e2711cf.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006def.bin
86ceeece5017e07660d1380814fc0d4e417a07ee30fa43204038bd307dace4c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEF 5440 bytes
font_01_sfnt_off0000805f.bin
d72c6212c430432318ac93fbeb4609698ab24af41a8eafbb308832033dc21a41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x805F 2932 bytes
font_02_sfnt_off00008c58.bin
c6a4be30f00ac0f2577e3dd04c54d1cfc9df268d2786a1e6ff73508fab790bcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C58 10420 bytes
font_03_sfnt_off0000b029.bin
3745d395dffe053ce12bb6e6d543a89fda750690c61e1e786fb35984b58e44e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB029 16344 bytes

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