Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0310053adfbf68d…

MALICIOUS

PDF

82.6 KB Created: 2020-08-31 10:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: befd0d39fbfe8a35990dcedf24b2ab5d SHA-1: 78f97f92ae3727eb774574336632e4010730eb0b SHA-256: c0310053adfbf68d90d0067872e2181f6f1b179fac52b133b4f1691f76f8e89e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=dos2+blood+dowry'. This URL is presented within the document body, disguised as a notification related to a 'dowry'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign but likely serve to obscure the malicious destination. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=dos2+blood+dowry
    • https://static.usrfiles.com/ugd/ae15ca_50223e7b75f4468b85362ac658d0c256.pdf
    • https://static.usrfiles.com/ugd/32acb1_5476e71e46d244d3a0765c8c3de07677.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c52407394504aaeba3a17284267aed0.pdf
    • https://static.usrfiles.com/ugd/98857b_d3ec8c99192042a18750b5da50f9cb7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_0efc339b98e747a992879437c9e52293.pdf
    • https://static.usrfiles.com/ugd/c068f8_5190fb8d1e56497f9d75768f7b4bb16e.pdf
    • https://static.usrfiles.com/ugd/a91264_4ee8a6134e474bb281aa28d7abf8f3ed.pdf
    • https://static.usrfiles.com/ugd/e3325f_551a993f3f7743bba8aea0e6885ebe3c.pdf
    • https://static.usrfiles.com/ugd/0047a4_118e73542c1543319eb94c7b773b3394.pdf
    • https://static.usrfiles.com/ugd/0df15e_d5e611e818264077b3b5126d8c49e5c4.pdf
    • https://static.usrfiles.com/ugd/0049ca_18a55c95bce54568a362da7a1a1720a9.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_f135d9d5c3104a9c9f968e37c90c1aaf.pdf
    • https://static.usrfiles.com/ugd/d5415a_7b317215a69e463e8b2c8d4b80e5601d.pdf
    • https://static.usrfiles.com/ugd/804ff6_88c134ac9af54a65b39ec02818ca6c01.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_cf2a304313b74dcf88fa699f5d8bb4b0.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_c0f448fbbafb446cbaa28370e7eb9e34.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_off000108e2.bin
12211f63738c8962a7e7f11c92bed9f1c4b319cad037398eb46eb85d668144b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108E2 5076 bytes
font_01_sfnt_off00011a48.bin
d7afc80e2121586d7075cec77d081d190b4ab0118c9f78e074e1d143c14eb263		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A48 10368 bytes

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