Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0cc31ec1ca13d6a…

MALICIOUS

PDF

65.7 KB Created: 2020-08-22 21:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8e019f47cb38a3f5f36309b3df51ed2 SHA-1: 7db39b1d6bac67e629c2dbcb0c58fb5940cfffa0 SHA-256: d0cc31ec1ca13d6a6caa1874fa40c8f2ae54053a5d068b4ae84728287e8543d1
128 Risk Score

Malware Insights

MITRE ATT&CK
T1200 Hardware Add-in T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link farm and a malicious redirector. The document body, though heavily obfuscated, contains a URL that points to a malicious redirector, which is likely intended to lead the user to a malicious download or phishing page. The presence of a 'download button' heuristic further supports this. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=android+studio+adb+path+linux
    • http://files.ablankanvas.com/uploads/1/3/1/4/131438427/furodi.pdf
    • http://files.gistrummers.com/uploads/1/3/0/8/130874305/56fa3e71ce.pdf
    • https://cdn.shopify.com/s/files/1/0431/6545/0391/files/65005522451.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/desufomanorixewusezudo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1652/6752/files/rufiluzazenawogepejoki.pdf
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/sleep_and_academic_performance_theory.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8454/files/javevuzomaxokejovugonodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/86020703182.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/83410662138.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90209356055.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2719/files/terraria_armored_cavefish.pdf
    • https://cdn.shopify.com/s/files/1/0438/2644/6496/files/cepacaina_spray_bula.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_off0000c243.bin
154e661cbf1dfc7c4d1fe763cbb2140dd5e109b567808ae02a7cc0f6ecb8f587		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC243 5244 bytes
font_01_sfnt_off0000d408.bin
2523ecd6e2b2c6c1d87a836f6ee1855d3c90c9500caf5910f172743f5e376d9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD408 11140 bytes

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