Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68eadf6f9e778e4…

MALICIOUS

PDF

43.1 KB Created: 2020-09-03 01:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2b1cc417721ba9b7a93e7cd814fc1a9 SHA-1: 6afaf8de19023446a125e378186a44ce01736e42 SHA-256: e68eadf6f9e778e4e11508f2a1b0ccb32190f60e358ce2717c3e68ca7802aef7
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.003 Windows Command Shell

The PDF file contains a lure document disguised as a "Linux commands cheat sheet for interview". It embeds a malicious redirector URL, https://ttraff.me/wix?keyword=linux+commands+cheat+sheet+for+interview, which is flagged as malicious. The document also instructs the user to copy or paste clipboard content into a shell context, indicating an attempt to trick the user into executing commands. The presence of a large number of external PDF links, many pointing to static.usrfiles.com, suggests a link farm or SEO poisoning tactic to improve search engine ranking for the malicious content.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=linux+commands+cheat+sheet+for+interview
    • https://static.usrfiles.com/ugd/aff7ca_9e533e55f5c84e5ab01ef45989e5f33c.pdf
    • https://static.usrfiles.com/ugd/11f207_b08343d8443d4177b67836ddbb37e62d.pdf
    • https://static.usrfiles.com/ugd/e745be_ff37da5e077a4545a398157201282716.pdf
    • https://static.usrfiles.com/ugd/b444d4_da4914724f3e401987c187b2b2973e8e.pdf
    • https://static.usrfiles.com/ugd/135178_b0417d48270b4900bdf38a993cb20cf8.pdf
    • https://static.usrfiles.com/ugd/b52961_b6d6fe8ea33d45cb9f3ffd891a7aa279.pdf
    • https://static.usrfiles.com/ugd/b80405_abe26fec84174b9ca9e3e4db1ee4dcc7.pdf
    • https://static.usrfiles.com/ugd/c068f8_f98731aca3574393a919909429453670.pdf
    • https://static.usrfiles.com/ugd/de60da_6318ca668eef4337be1690932cc0d236.pdf
    • https://static.usrfiles.com/ugd/a382ee_d8bc753aa19a4f12adb1ddaeb0fabca5.pdf
    • https://static.usrfiles.com/ugd/bfbc46_7927dbaa308f4db8aec6d4c666f55507.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_off00006a72.bin
22a43f3f12decc4fca5f52af40802b7e86b4fe7f6998326228c74fc8e6b6ec86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A72 5388 bytes
font_01_sfnt_off00007cb5.bin
ea5bdc2b8627167690550b3f06192624b949afae91b6ae51a589b2f12b3c754b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB5 10336 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.