Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe3a5c3db17ae4a…

MALICIOUS

PDF

39.8 KB Created: 2020-08-01 16:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9333e1465fd807e30dfc2561614568fb SHA-1: daabeb1057324626c132d8694915700e616043a7 SHA-256: cbe3a5c3db17ae4adce62ae3476c94ee3d2688c37a93e401e815cadcfabc9459
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=push+code+to+github'. Additionally, it exhibits a PDF link farm behavior, with numerous links to PDFs hosted on cdn.shopify.com, the first of which is 'https://cdn.shopify.com/s/files/1/0433/3820/3290/files/35319803786.pdf'. A critical heuristic also indicates a clipboard command execution lure, suggesting the document instructs the user to copy and paste content into a shell, likely to trigger further malicious activity.

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.ru/pify?keyword=push+code+to+github
    • http://files.allgeierchiropractic.com/uploads/1/3/1/4/131409333/zowaruwutolekum.pdf
    • http://files.moxiechattanooga.com/uploads/1/3/2/3/132302824/84d54e8dfd8.pdf
    • http://files.anxiouslittlepishy.com/uploads/1/3/2/7/132740204/9894160.pdf
    • https://cdn.shopify.com/s/files/1/0433/3820/3290/files/35319803786.pdf
    • https://cdn.shopify.com/s/files/1/0433/5645/5067/files/84333716478.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/lefijegilidujujorelalobab.pdf
    • https://cdn.shopify.com/s/files/1/0434/6619/5106/files/10546634765.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/40656580592.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/perog.pdf
    • https://cdn.shopify.com/s/files/1/0433/6372/9557/files/sobep.pdf
    • https://cdn.shopify.com/s/files/1/0428/5094/3142/files/gezeletibizanoburoxipew.pdf
    • https://cdn.shopify.com/s/files/1/0429/1536/5031/files/revasuguritikepe.pdf
    • https://cdn.shopify.com/s/files/1/0437/8014/5313/files/xiwofuxulilexupowidonuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4231/files/wunisuvojuwexanibam.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/11296469416.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_off00005b29.bin
f563b7ac17dcfddf3ef1c2da45ae8328da1d3c72e366475cc65e64c1e3f20b9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B29 5004 bytes
font_01_sfnt_off00006c2d.bin
fe1040f4053f0e2155a8a0d1a51dd1e4466711af39f3de080a3bc38524de7a67
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2D 12160 bytes