Malicious PDF — malware analysis report

Static analysis result for SHA-256 b550c8e59fba7d2f…

MALICIOUS

PDF

58.2 KB Created: 2020-08-06 16:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74ec7f9484fd6eec69c04aa5ddd4e257 SHA-1: c54f312bfc7e8150b9cc5958ae2a2488f427d0b7 SHA-256: b550c8e59fba7d2fd4f13893c12fcd000263943811638f4d4c780ed8e827e570
168 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a link to a known malicious redirector and a link farm. The document body and heuristics suggest a lure to install a browser extension or download content, with a prominent link to 'https://ttraff.ru/pify?keyword=adobe+acrobat+reader+edit+pdf+free'. This indicates a social engineering attack aiming to trick the user into visiting a malicious site.

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.ru/pify?keyword=adobe+acrobat+reader+edit+pdf+free
    • http://files.kokuabehavioralhealth.org/uploads/1/3/1/1/131164176/67eb7f46307f965.pdf
    • http://gojux.advocatesfordiversity.org/uploads/1/3/1/6/131636725/334f3b21a464.pdf
    • http://files.tlcsupply.com/uploads/1/3/0/7/130775174/16a2cf0071f9d.pdf
    • http://files.emaratshipping.com/uploads/1/3/0/9/130969993/1631a7714.pdf
    • http://files.mystarsandstripes.com/uploads/1/3/0/7/130776016/741037.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/2543825088.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8774/files/fundamentals_of_calculus.pdf
    • https://cdn.shopify.com/s/files/1/0435/3284/5207/files/zadakuroxufa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/athens_metro_map_english.pdf
    • https://cdn.shopify.com/s/files/1/0435/5801/1035/files/90116706185.pdf
    • https://cdn.shopify.com/s/files/1/0432/3187/1139/files/all_creatures_great_and_small_james_herriot_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/dazugiwulukizani.pdf
    • https://cdn.shopify.com/s/files/1/0435/3058/4213/files/gibukuwakewiware.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/67171018958.pdf
    • https://cdn.shopify.com/s/files/1/0434/4915/5740/files/28382329612.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007723.bin
29a88c7496b0c3ffac777a833e1e7d9af63a0e682d1191a478c4f7b25fc256e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7723 5236 bytes
font_01_sfnt_off0000898d.bin
c98e0b9e6a6da610345d1000db13b0a27e99824858dc87d7d220dd598505bf7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x898D 5068 bytes
font_02_sfnt_off00009ada.bin
794c6d3a99cd37080d9ee7ed0ffc0f8174ea5826d07e1db8a3efd880e39ed53d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ADA 14784 bytes
font_03_sfnt_off0000c3ea.bin
d6cec5d81403a3d70faea1540ef19555465bc704c2477342a2b01c02bc8a8e2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3EA 16488 bytes

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