Malicious PDF — malware analysis report

Static analysis result for SHA-256 4817d7cbfccae48e…

MALICIOUS

PDF

48.6 KB Created: 2020-08-23 07:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ab5b72444ad3dff4c8cd29e00c2b31e SHA-1: 64277b17bfae1101e7b992f94b786ff7af01e7c5 SHA-256: 4817d7cbfccae48ed5003221c25c9a0c0389272133e95264050056ff9060bd80
160 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic identifying a link to a known malicious redirector infrastructure. Another heuristic indicates a PDF link farm, with the primary link pointing to a Shopify domain. The document body and heuristics suggest a social engineering lure to install a browser extension or update. The embedded links likely lead to further stages of the attack, potentially downloading additional malware or redirecting to phishing sites.

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.
  • 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
  • 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=anonymous+browser+free
    • http://najoji.shirtkingzcustom.com/uploads/1/3/1/1/131164250/joseturatod-tetemumepatesat.pdf
    • https://cdn.shopify.com/s/files/1/0434/6282/0005/files/takoxeguxanaxared.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/aaoifi_fas_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57379697448.pdf
    • https://cdn.shopify.com/s/files/1/0434/0121/6163/files/examiners_report_edexcel_history_2018.pdf
    • https://cdn.shopify.com/s/files/1/0428/6670/4550/files/kizamapegefade.pdf
    • https://cdn.shopify.com/s/files/1/0433/2011/5358/files/2792117579.pdf
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/subutowu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/pofiwewetopavakepabat.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/androgenetic_alopecia_treatment.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_off00006a94.bin
395eca758cd8d63c88c04b67f674cc6798dbc6ecf8606096e85def4c3bc41606		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A94 4992 bytes
font_01_sfnt_off00007b8e.bin
c753d688873532ff622fd5ccbd0c36b625f67e916beaf1d5ce68a5933a703606		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8E 10612 bytes
font_02_sfnt_off0000a003.bin
5574da6b353e82d281b331cfb0d5ce524f145a6f41ab8b2c60f06522538da958		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA003 16324 bytes

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