Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9945bc9588314ef…

MALICIOUS

PDF

46.5 KB Created: 2020-08-31 03:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbae910060367f7bfdaff1f21a1e1cfa SHA-1: 6faad04e68f431db1ab3aab93c8171cdc8ad5cf4 SHA-256: a9945bc9588314ef15d7cc286891248eae49acf25e12d1b8bd5a643ca694c240
168 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for a password-protected file. The document body, though heavily obfuscated, contains the malicious URL and a list of benign-looking URLs, likely to appear legitimate. The heuristic findings confirm the presence of a malicious redirector and a password-protected archive lure, indicating a social engineering attempt to trick the user into downloading a payload.

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.
  • 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
  • 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.com/wix?keyword=downloadsnack+password.txt+%25281.4+kb%2529
    • https://static.usrfiles.com/ugd/77d535_7051cdb4378e48468f40bd0a925966a8.pdf
    • https://static.usrfiles.com/ugd/d01287_89bc37a5241a48f08b175430c1ea6701.pdf
    • https://static.usrfiles.com/ugd/b8c837_9acd4a48cc8e4e84a570bd63d510f73d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d07acbe22936413fafc8bd56083d66e7.pdf
    • https://static.usrfiles.com/ugd/a4e402_a906f9129a934a36a8bd185c4731d2c6.pdf
    • https://static.usrfiles.com/ugd/66c878_84da64163f744a43ad5a1de418e053bc.pdf
    • https://static.usrfiles.com/ugd/33ab24_990138cbbcda428588ebfdb1080df030.pdf
    • https://static.usrfiles.com/ugd/ea2f88_4b0aa46a117d4f9f977537a0637c6e3c.pdf
    • https://static.usrfiles.com/ugd/238140_44576febd17c42ad87f511d8173386aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_f75d0ced24b24eb597af283b00288375.pdf
    • https://static.usrfiles.com/ugd/b8c837_cbe712cf79044c0db5f095efe17b8408.pdf
    • https://static.usrfiles.com/ugd/735189_97d8367b48e944a186588a18fab6bb16.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_5998f632040b4e949ed515777155480d.pdf
    • https://static.usrfiles.com/ugd/01e791_eb0da028633b46abb3700ebf02a5df45.pdf
    • https://static.usrfiles.com/ugd/defcb2_c7f785e6cc5347678712e565caf4b768.pdf
    • https://static.usrfiles.com/ugd/b8c837_42246c1f7e694986bcaaca0ab1f366a2.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_off00006665.bin
e195be2f3d4c1bb5cd94df81ea707d7c049ef7526db0969707c0b4cb91356119		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6665 5380 bytes
font_01_sfnt_off000078e6.bin
bea7d2b198d56de05538b0a2b0c0a4fb1bccad2d61b45c10848ba846ba347640		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E6 11236 bytes
font_02_sfnt_off00009f0e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F0E 4324 bytes

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