Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf3a8afee4823af9…

MALICIOUS

PDF

48.1 KB Created: 2020-08-23 20:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fb8f9647b567dfb24c25280b8884feb SHA-1: 740aa27b7f1dd0f06aef605ee7fcee4445107945 SHA-256: cf3a8afee4823af9ae553875053557b47fefc567fa714d13608d8998c70d7754
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=android+headphone+amplifier+app'. Additionally, it exhibits a PDF link farm behavior, with numerous links hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute content. The document body and heuristics indicate a social-engineering lure, prompting the user to install a browser extension or update to view content, which is a common method for malware delivery or credential theft.

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.com/pify?keyword=android+headphone+amplifier+app
    • http://files.tantrumlab.com/uploads/1/3/2/6/132695571/zekibugek.pdf
    • http://files.graceandrachel.com/uploads/1/3/1/8/131871501/fadedaroguwobopolesa.pdf
    • http://files.alberto-micheletti.net/uploads/1/3/1/4/131452821/5990754.pdf
    • http://files.tantrumlab.com/uploads/1/3/
    • https://cdn.shopify.com/s/files/1/0431/0374/8247/files/axis_bank_corporate_net_banking.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6731/files/vokize.pdf
    • https://cdn.shopify.com/s/files/1/0431/9471/2228/files/ririfumepekokixuramu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dejotoxirebogoro.pdf
    • https://cdn.shopify.com/s/files/1/0428/5323/6902/files/56549414946.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/velupofova.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gipal.pdf
    • https://cdn.shopify.com/s/files/1/0433/2804/5209/files/wozesinebejuburamanisaxaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/1798/4405/files/ascii_and_ebcdic.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/rumejubagile.pdf
    • https://cdn.shopify.com/s/files/1/0430/4109/5834/files/mefitawubowifuvux.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_off00007e9b.bin
f9788d05a8456c5eea2e1353832ffd90b6392174fcad0f8712e4e06653bf19a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9B 5092 bytes
font_01_sfnt_off00008fbd.bin
6fba020660ef03f09960e3785422f967c15f4e33e6b111580853e0c557098d5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBD 10420 bytes