Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b4fb099d6d74108…

MALICIOUS

PDF

51.1 KB Created: 2020-08-31 03:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e57b7583ea843f800aaa241d76f846b9 SHA-1: 377d2033da6ae949eca8ae2bf956d1ae3e9ef320 SHA-256: 8b4fb099d6d7410863c4ab34ae6644a49cecb92e864f26ab988e9912480591b6
162 Risk Score

Malware Insights

MITRE ATT&CK
T1204.001 Malicious Link T1059.003 Windows Command Shell T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a search result for a popular book. The document also contains instructions to copy and paste content into a command-line interface, indicating a social engineering lure to execute commands. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector and the command execution lure strongly suggest a phishing or malware delivery attempt.

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.cc/wix?keyword=learn+python+3+the+hard+way+pdf+2017
    • https://static.usrfiles.com/ugd/ca9b0a_0ac3b6c6c5224bf0a2b623bef49b2dce.pdf
    • https://static.usrfiles.com/ugd/b8c837_9616aa18dc914bb6bb01111b6d486959.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c0b1f739eb242aa9231e83263d6eb70.pdf
    • https://static.usrfiles.com/ugd/5bb01c_fdf0259df0e14f80a349e68386a92b16.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_4c0ff1e441684e3b8dad56b0da3e4055.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowelikuzamutaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/pasetuvegemozigedefumow.pdf
    • https://cdn.shopify.com/s/files/1/0431/0577/9863/files/merge_two_sorted_linked_lists.pdf
    • https://cdn.shopify.com/s/files/1/0428/6572/1503/files/22060875779.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/55538206749.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7610/files/i_am_mad_scientist.pdf
    • https://cdn.shopify.com/s/files/1/0434/1704/3111/files/nevawonuxamekafapadufaso.pdf
    • https://cdn.shopify.com/s/files/1/0440/1194/6134/files/kowozofijelaxuviseti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xomuburisuxenogiduta.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/kakunoraxozapozenoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/0992/3480/files/81555560541.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_off00006fc5.bin
b4d866f90e48eb45d5be356c5bee66216f5e5d1fb88f2951d6617c493ae834cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC5 5364 bytes
font_01_sfnt_off00008217.bin
59a8f3748b68c1ae1280a14f7e15a7780a5fe0cc1e88f52ee4dbba7f629e006c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8217 15044 bytes
font_02_sfnt_off0000b0d7.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D7 4324 bytes