Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5ceb11164ec81e…

MALICIOUS

PDF

48.6 KB Created: 2020-08-02 05:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ed2253ec71197966752b4a80aee8f6a SHA-1: 77f993106b540410eed919fa1a7e7385632e018e SHA-256: 7d5ceb11164ec81eecd6dfa72c8a1f7a64c380c7105d92fb8ecb49ab7a8af137
220 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1566.002 Spearphishing Attachment T1059.003 Windows Command Shell T1553.005 Security Software Installation

The PDF contains a malicious redirector link to 'ttraff.ru' and a large number of external PDF links, many hosted on Shopify. The document body and heuristics indicate a lure to disable security software and enable editing, likely to facilitate the download and execution of a second-stage payload from the embedded URLs. The presence of multiple Shopify-hosted PDFs suggests an attempt to blend in with legitimate content.

Heuristics 6

  • 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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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=your+dns+server+might+be+unavailable
    • http://files.jmpzclothingapparel.com/uploads/1/3/2/3/132303035/mopupusuzigal.pdf
    • http://files.offthegrid24.com/uploads/1/3/0/7/130738988/kivunezalun_genusej_fegevev.pdf
    • http://files.yassvalleyk9.com/uploads/1/3/1/3/131380848/tuxidej-kokufejujibage.pdf
    • http://files.cmebenezer.com/uploads/1/3/1/1/131163851/7326266.pdf
    • http://files.parallaxphotographyrs.com/uploads/1/3/1/4/131409463/c13da6482872.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/jidaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/80591648311.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2666/files/9670687413.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4246/files/mefenabujo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/salukaguwajup.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/44963895513.pdf
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/tojakefijadofofapudeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/leatherworking_leveling_guide_ffxiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/6747/4087/files/xedaxenavi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/suxabunosafudovoxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22271122494.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_off00007fa9.bin
87f6a2b7042935cafdbbbc12d36cf5a167700238fffb6b683caea680a82b9fb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA9 5400 bytes
font_01_sfnt_off000091e0.bin
cd470e3d0ec460c71e95b5f5882e52a978d5e24ad1fd9d5d7211d3c808c47763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91E0 10348 bytes

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