Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ba5bace9795c09…

MALICIOUS

PDF

43.3 KB Created: 2020-08-31 04:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1771cbb5963389b0255cf94a11b19d2 SHA-1: 9503a977026044d079166cdef065630793aadb72 SHA-256: 27ba5bace9795c09fa8c5c66956cec01d367907003a4f1d462c480f0d089c542
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent link pointing to a known malicious redirector. The document body, though heavily garbled, contains text related to 'Stellar phoenix windows data recover' and the URL itself, suggesting a lure to a fake recovery tool. The presence of numerous PDF links indicates a link farm strategy, likely to improve SEO for malicious content or to distribute further malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=stellar+phoenix+windows+data+recover
    • https://static.usrfiles.com/ugd/5926b4_f7f8e3a2602f4439a68785e45906089b.pdf
    • https://static.usrfiles.com/ugd/33ab24_51838e7f0ef94cfb9ab0c83ccc14fe3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d37f782aa0d8453083f83d42f24afbc5.pdf
    • https://static.usrfiles.com/ugd/02beb7_144052d48c7f467a807414418e323512.pdf
    • https://static.usrfiles.com/ugd/12f4eb_6a5ffef675c44f48a438d12f9962e2b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b34afd1f93244f2a89670dc982793ca8.pdf
    • https://static.usrfiles.com/ugd/0d002d_06da15480fb94aadbcda3d51c14d0b74.pdf
    • https://static.usrfiles.com/ugd/b8c837_1de3566b0fd0421b93de172b59c58feb.pdf
    • https://static.usrfiles.com/ugd/96768c_f009ceedcbfa4124b00157a0edbbcefd.pdf
    • https://static.usrfiles.com/ugd/b8c837_f45ee15d0da44aeeae51d85a94ec3e0b.pdf
    • https://cdn.shopify.com/s/files/1/0454/0376/6952/files/baila_samba_conmigo_line_dance.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0136/files/vertigo_exercises_brandt_daroff.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_off00006962.bin
edad390073516ea35083cd7b56de97aafb3e0fb374a26e7ffb9f70da844f4d05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6962 5484 bytes
font_01_sfnt_off00007c13.bin
bb3bfe907228aefb3eb4236895601208fa7f59ec62b1cc7e404289b57357be63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C13 10704 bytes

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