Malicious PDF — malware analysis report

Static analysis result for SHA-256 b884c54b10bb1a8a…

MALICIOUS

PDF

51.1 KB Created: 2020-08-30 02:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 714a74609796edf809a2e2ed9d6c448d SHA-1: f5f60d56571d2dd1a966ff89047d4cc1418541bd SHA-256: b884c54b10bb1a8a68b2f21057e1e084ae0cf49da256c8f97c20a0eef2a5406f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a malicious redirector link and a large number of external PDF links, masquerading as a lure to download embedded video. The document body text, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=download+embedded+video', which is flagged as a malicious redirector. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's content is designed to trick users into installing software or extensions, a common social-engineering path for malware delivery. The presence of numerous benign-looking PDF links, while potentially a link farm, also serves to distract from the primary malicious URL.

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.cc/wix?keyword=download+embedded+video
    • https://static.usrfiles.com/ugd/b8c837_da91eb6cea424e249b9b5cf871653045.pdf
    • https://static.usrfiles.com/ugd/286fb8_1eb285d30c554c3b9f2524a6253fa8a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d22703b85a6d411d9fefa678b0fa9ddf.pdf
    • https://cdn.shopify.com/s/files/1/0436/8026/8438/files/8193230791.pdf
    • https://cdn.shopify.com/s/files/1/0428/7211/1260/files/john_deere_d140_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/puxetibalovo.pdf
    • https://cdn.shopify.com/s/files/1/0454/4813/4814/files/android_developer_jobs_in_kolkata.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/88766356429.pdf
    • https://cdn.shopify.com/s/files/1/0461/5156/5475/files/kinimedekukepowisuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/18738423963.pdf
    • https://cdn.shopify.com/s/files/1/0430/7966/3765/files/chama_chama_new_video_song_2018.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/logical_reasoning_meaning.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_off0000744b.bin
c7a8139e80e9ae118ed421d9e46e6d72482d39f53c3d38b2f74543eebeac0f03
pdf-font-stream PDF embedded font (sfnt) at offset 0x744B 4988 bytes
font_01_sfnt_off0000854e.bin
9a59327778636f77838c050a95875558f26a23ea75737500efa59eec3e56deaf
pdf-font-stream PDF embedded font (sfnt) at offset 0x854E 10748 bytes
font_02_sfnt_off0000aa3b.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA3B 16204 bytes