Malicious PDF — malware analysis report

Static analysis result for SHA-256 8842ce3b0ebfbde0…

MALICIOUS

PDF

44.4 KB Created: 2020-09-02 07:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8c14196cbf0b0af4b820a8bc149a7f0 SHA-1: 32cdaf922651a737c4be4a6b443e04f7c459bbbc SHA-256: 8842ce3b0ebfbde078126a507377067b0502bdd6b619b21ff849397638dc52ec
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to PDF files hosted on static.usrfiles.com. One prominent link, disguised as a baptism certificate template, redirects to a malicious URL (https://ttraff.cc/wix?keyword=baptism+certificate+template+word). This suggests a social engineering tactic to drive traffic to malicious infrastructure. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the payload.

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.cc/wix?keyword=baptism+certificate+template+word
    • https://cdn.shopify.com/s/files/1/0453/8272/9896/files/75738002734.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4807/files/89398128562.pdf
    • https://static.usrfiles.com/ugd/b444d4_ed02fb3a1ebd4d2d848c707bf1020807.pdf
    • https://static.usrfiles.com/ugd/09273f_87d0aa0faa04419095fb5f2d04fa965d.pdf
    • https://static.usrfiles.com/ugd/edb4a7_04826d7230e1455781652622b0e8b981.pdf
    • https://static.usrfiles.com/ugd/8b2c09_bf73621c0c714698b1b101ca3ad3ad7e.pdf
    • https://static.usrfiles.com/ugd/a86d68_4375e32228c5484e86ffdc58c7f2af03.pdf
    • https://static.usrfiles.com/ugd/b8c837_85da2e815a04463ca0461b7aa322d485.pdf
    • https://static.usrfiles.com/ugd/bc0b97_a7edd5b602194b7d9e5a847746c969dc.pdf
    • https://static.usrfiles.com/ugd/cb5dea_5f3feaf7d6504d2c91535efd50405a98.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5f0b8d127c7440aa11bdf2ae9256a3a.pdf
    • https://static.usrfiles.com/ugd/f0e51d_54c2114a835346cb8c08638e1f27b3a9.pdf
    • https://static.usrfiles.com/ugd/fef806_da40356577d64ead82bc202ec540204e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c83f09f74119469e8cda89061375930c.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_off0000706b.bin
5075d674f124e45232f14e0873291eadf6b213a48f0a2397848d454e4ec1de5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x706B 5444 bytes
font_01_sfnt_off000082e9.bin
bc2184cfa2f364181bc1df61280d18670510f6ee1238a5372526b99468757762		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82E9 9868 bytes

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