Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c83fb9f64621489…

MALICIOUS

PDF

39.4 KB Created: 2020-08-19 02:39:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df009bbf9a508039ba039204af0a9934 SHA-1: a81dc16630ae8b1b8d3b1277949ca0d8754d8b81 SHA-256: 2c83fb9f64621489d81e9d7227247875a5d2650100424151451c94bbfe7dd09d
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.001 PowerShell

The PDF document contains a lure to download a Google Chrome APK for Jio Phone, directing users to a malicious redirector URL. It also functions as a link farm, with many embedded links to external PDFs. The primary attack vector appears to be social engineering, tricking the user into executing a malicious file disguised as a legitimate application installer.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.com/pify?keyword=google+chrome+apk++for+jio+phone
    • http://nadanije.coburnsandandgravel.com.au/uploads/1/3/2/7/132740214/lakekozijifitagotev.pdf
    • https://cdn.shopify.com/s/files/1/0429/3797/4950/files/31346197425.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/18181611333.pdf
    • https://cdn.shopify.com/s/files/1/0431/5296/5792/files/63254032317.pdf
    • https://cdn.shopify.com/s/files/1/0435/8995/9843/files/cisco_2960_switch_configuration_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/catholic_cursive_handwriting_worksheets_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0350/files/73928087885.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/dumidagixuvadata.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_off00005ccc.bin
266e0c8d00293b275952560f7552bab96ebd30425d1c67a3d42541687af9e730		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCC 5420 bytes
font_01_sfnt_off00006f25.bin
97a09305209952e0307b43ac6c1626ffd65254dbeb4bed0fab574dcc56d6d9fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F25 10012 bytes

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