Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a87f99388a62cf…

MALICIOUS

PDF

122.6 KB Created: 2020-08-08 13:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6ffb7eb570c6caff4951b54ed6a8de7 SHA-1: bef5d3060246f7226673e6238307b41b4afff1e2 SHA-256: c0a87f99388a62cf3a41f625e22eca6dc24f0c5adbb268a45b63bd107f602e1d
208 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=hinario+caboclo+guerreiro+vo+corrente+pdf', is designed to lead users to malicious infrastructure. Additional heuristics indicate the document uses social engineering lures, such as a password-protected archive and a browser extension installation prompt, to trick users into proceeding. The presence of a link farm suggests an attempt to manipulate search engine results to distribute this malicious 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.cc/pify?keyword=hinario+caboclo+guerreiro+vo+corrente+pdf
    • http://files.lthbconsulting.com/uploads/1/3/1/1/131164476/sikasufalezisuze.pdf
    • http://files.tildenhouse.org/uploads/1/3/1/3/131378838/tejedigulufobir.pdf
    • http://files.themanchesterscoop.com/uploads/1/3/0/7/130776082/5684972.pdf
    • http://files.floridacommercialrealestate.us/uploads/1/3/2/6/132681294/4054764.pdf
    • https://cdn.shopify.com/s/files/1/0437/1854/1480/files/accounting_for_small_business_owners.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/ziwatuva.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/sea_sorcerer_5e.pdf
    • https://cdn.shopify.com/s/files/1/0432/0267/4845/files/dukezugoneta.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mesibilefonupas.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/check_plagiarism_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/54595236809.pdf
    • https://cdn.shopify.com/s/files/1/0435/8216/1053/files/sao_fatal_bullet_cheat_engine_table.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/43566980188.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/90090449355.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/dorokusajogisadanebamovof.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5916/files/31725753072.pdf
    • https://cdn.shopify.com/s/files/1/0434/7356/7901/files/reverse_nodes_in_k-_group.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_off00018df9.bin
e7d74267de8c5e8f55669bfa7a8d75706bd35695ee90704334117220c8dd6ba6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18DF9 5308 bytes
font_01_sfnt_off0001a018.bin
951241f5328c6959287334639e214b594281c99d7d8a90785e7ec1c4d149c719		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A018 12268 bytes
font_02_sfnt_off0001c70f.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C70F 16312 bytes

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