Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9a8797f4a339d91…

MALICIOUS

PDF

40.5 KB Created: 2020-08-31 02:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f0db4570c99b49fae2fd23b350eba50 SHA-1: 265e34b1da3f6b0f2ebfedd8e31839183df07020 SHA-256: a9a8797f4a339d91a574e974c976f9964b14fc5df529cf9f73207951ab890abb
160 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector infrastructure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document's purpose is to trick the user into downloading a password-protected archive, likely containing malware. The document body itself is heavily obfuscated but contains the malicious URL, indicating a social engineering attempt to lead the user to a malicious site.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.club/wix?keyword=cs+go+aufl%25C3%25B6sung+%25C3%25A4ndern
    • https://static.usrfiles.com/ugd/0f1814_63cf7352ebf14e90acd9177e32561898.pdf
    • https://static.usrfiles.com/ugd/f09a9d_8f0ea6f3bea649e387f9a0c1aaf86c74.pdf
    • https://static.usrfiles.com/ugd/90423f_ced94dc446a04da59dc833a504691740.pdf
    • https://static.usrfiles.com/ugd/ee6770_c1d91a672ba64a27a4327dd146858159.pdf
    • https://cdn.shopify.com/s/files/1/0437/2817/5255/files/78584733751.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9930/files/el_embarazo_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0434/6255/7856/files/24532952726.pdf
    • https://static.usrfiles.com/ugd/b8c837_11e581ef13624aa7a70b29450cc945d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a4c71da2b7344d285032b6f52991236.pdf
    • https://static.usrfiles.com/ugd/b8c837_45cc10e0495148158bd08491093cf7de.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_off00005ca1.bin
91882d77d3ec22a3ad3a126089a2bb6d817fe67f9dc7739f4d0095dfd266bda2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA1 5356 bytes
font_01_sfnt_off00006e10.bin
cebedefa1c712ba0c1b2ff48b9aa2b67d4b1c6fcb47f4807aabdbd5c70698286		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E10 11492 bytes

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