Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e36cc831bd2e607…

MALICIOUS

PDF

38.0 KB Created: 2020-08-29 14:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed535340c3bc75611effb78240a5e3ac SHA-1: 7868c4fc822ff8df618559244052fa6f5cc27b2e SHA-256: 8e36cc831bd2e607b504b85797fe9675924cb18fb339f88db08bee8cd6ea635d
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a keyword that suggests a topic of interest. The document also contains numerous links to external PDFs, forming a link farm. The presence of a 'Password-protected archive lure' heuristic suggests the document may be intended to trick the user into providing a password for a subsequent malicious archive. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.club/wix?keyword=x+plane+a320
    • https://static.usrfiles.com/ugd/b8c837_042bcdc01125418b8b193e4ea30b423a.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecb37b88129a46bbaef3ba65d93a493f.pdf
    • https://static.usrfiles.com/ugd/b8c837_255cab9218ea446897b28ca64baf0d1b.pdf
    • https://cdn.shopify.com/s/files/1/0436/0955/5107/files/4213834075.pdf
    • https://static.usrfiles.com/ugd/b8c837_8341c4b656a844e8b5af283556d54cae.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0ea56c7aa4146cd89f05fe9798ac2d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_6903746f92c34522a1c43f30543d62ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d5799f78f5b4823b5c50e9db585f5f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_441bc173269a423b8cc0cf9aab728601.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_off00004800.bin
ebd1f5fc824f037ef04f0708327f40547f34a5599a8175f5d0329e377cc027df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4800 4920 bytes
font_01_sfnt_off000058f0.bin
6a8cb608eaf9e6c8101793d3ec1b01b174b3ab8db86d97dde3d58258d4887d70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F0 4956 bytes
font_02_sfnt_off000069d8.bin
c3288f0bf35b67fd5e2916637a59d83fd9e819f7e87cacde3adedd76ec3e1cad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D8 9888 bytes

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