Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2064a2a843fab3…

MALICIOUS

PDF

60.0 KB Created: 2020-08-31 23:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e2ad5c00a2f98ad4e12ffb1b9fa380c SHA-1: 52a5a100fa7d8b5dfabe2eff1d32c2e2ad699b59 SHA-256: bd2064a2a843fab374b0fe3f9180b93fd81e28cd86e5198c2c6e884d897423a2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204.001 Malicious Link T1566.002 Spearphishing Link

The PDF contains a link to a redirector URL, which is a common tactic for delivering malicious payloads or phishing pages. The document body, though heavily obfuscated, contains text related to a 'Grammarly premium free trial guide' and the malicious URL itself, suggesting a social engineering lure. The heuristic 'SE_BROWSER_INSTALL_LURE' further supports the idea that the document is designed to trick the user into performing an action that could lead to compromise.

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.me/wix?keyword=grammarly+premium+free+trial+guide
    • https://static.usrfiles.com/ugd/c068f8_d09782db98404c8abcbb8b681267a7c3.pdf
    • https://static.usrfiles.com/ugd/565485_cd0db9bb4015486f85fd06d787e8dc58.pdf
    • https://static.usrfiles.com/ugd/76156b_f579fad62373432293181ad5066052dd.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/wifinupuda.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7175/files/2384279431.pdf
    • https://cdn.shopify.com/s/files/1/0429/2195/1391/files/7175116832.pdf
    • https://cdn.shopify.com/s/files/1/0437/9885/5840/files/blossoms_of_the_savannah_synopsis.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/47566212232.pdf
    • https://cdn.shopify.com/s/files/1/0432/0706/5757/files/allegany_state_park_map.pdf
    • https://static.usrfiles.com/ugd/b8c837_14d2ad49b4374aca9468dc11e86e9712.pdf
    • https://static.usrfiles.com/ugd/b8c837_05d5040985d642f49455785083da860d.pdf
    • https://static.usrfiles.com/ugd/b8c837_b15d50d21fc74e01b4827209e2ba98de.pdf
    • https://static.usrfiles.com/ugd/63022f_bf1a74da54f54fcb9efb3fc75edc3fe2.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_off00008b4d.bin
4b0771e0083bc850cfde70bf6c3d2d70943d66cb8d5a8463bf2eecf257d6aa0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4D 5316 bytes
font_01_sfnt_off00009d55.bin
b90db19c2f777b7dc0b707ba2317d3983e4e68eda5e0f6ca056e06946e48e157
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D55 2484 bytes
font_02_sfnt_off0000a7f3.bin
bfe94750a5a1da45d8bfe3e6861608fdb7a07d15ac997892cd8b6549ee4f7009
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7F3 10520 bytes
font_03_sfnt_off0000cc23.bin
5297616c16cab8b8db9ff150c57c2dcd6090fc77da665c347ad08242b93024bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC23 16704 bytes