Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28c9bae4466e8d1…

MALICIOUS

PDF

47.4 KB Created: 2020-08-21 04:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c5ac0db9c22774edbaa33c48d9dacc3 SHA-1: 83d9b945925d7c8e449f3399a043c61dec969188 SHA-256: b28c9bae4466e8d113b0835fc28e86348002219ce7ffac275db31532a64b65b0
200 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1059 Command and Scripting Interpreter T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.001 Command and Scripting Interpreter: PowerShell

The PDF document contains a mass of external links, many hosted on Shopify, and one primary malicious redirector URL. The document body and heuristics indicate a social engineering lure, specifically a 'ClickFix' type attack, instructing the user to press Win+R or paste a command into a terminal. This is designed to trick the user into executing arbitrary commands, likely to download and run a second-stage payload from the identified malicious URL.

Heuristics 5

  • 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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.ru/pify?keyword=sendgrid+email+template+variables
    • http://seputanu.womenslifechangecoach.com/uploads/1/3/2/8/132815367/7ddd9e75.pdf
    • https://cdn.shopify.com/s/files/1/0431/5647/1959/files/97742364021.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4547/files/difference_between_anthropology_and_sociology.pdf
    • https://cdn.shopify.com/s/files/1/0435/6974/1983/files/1670192789.pdf
    • https://cdn.shopify.com/s/files/1/0439/1862/2875/files/weight_loss_tips_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9371/1265/files/fetozukinasubofoxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/kabuximikunig.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2054/files/security_risk_assessment_methodology.pdf
    • https://cdn.shopify.com/s/files/1/0429/4216/9244/files/10590837023.pdf
    • https://cdn.shopify.com/s/files/1/0433/8899/3703/files/fill_up_ei_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/bokufox.pdf
    • https://cdn.shopify.com/s/files/1/0438/6324/4960/files/architecting_microsoft_azure_solutions_study_lab_guide.pdf
    • https://cdn.shopify.com/s/files/1/0461/8249/8467/files/cricket_one_day_cup_format_2019.pdf
    • https://cdn.shopify.com/s/files/1/0447/9841/0918/files/97119177837.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/99307517791.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_off00006606.bin
b897b4e6775a6bc9c2b2be88cf55d047278d1bb08df31593a66391223b34f4d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6606 5260 bytes
font_01_sfnt_off000077be.bin
c7b7a31462759421128ff0a7f6e8f9835419b1b413ff73fc2b452f63a1b9d5bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BE 13660 bytes
font_02_sfnt_off0000a2a7.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A7 4324 bytes

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