Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b35fa01c1a7af98…

MALICIOUS

PDF

42.1 KB Created: 2020-09-01 07:37:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d10e19362bba678320ca16036b61574 SHA-1: c3b25fa26d7c5b7f11dd1cea6ba9d5e37e5ed8c7 SHA-256: 1b35fa01c1a7af98b19233eebaaaf22025e5ff2bc30c4b9aef8b824a1e2b8f0a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One of the primary links, 'https://ttraff.com/wix?keyword=acls+certification+test+answers', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Acls certification test answers' and the malicious URL, suggesting a lure to trick users into clicking the link. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or redirection attack.

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=acls+certification+test+answers
    • https://static.usrfiles.com/ugd/ce5d00_c2ae88b1b4494d268ea8b59a80b9c3b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_179928909eac40b2b6fdd4043b1e727b.pdf
    • https://static.usrfiles.com/ugd/b8c837_64990923982f41f8ba4964a33c0c1216.pdf
    • https://static.usrfiles.com/ugd/83b1b3_e7e3853d9f644ce3b989e49ce134f023.pdf
    • https://static.usrfiles.com/ugd/3b7182_fe501c11ed1a443992802dd67ab094c9.pdf
    • https://static.usrfiles.com/ugd/3e5d97_bcc214b68ac84316ab67fad798b8fe68.pdf
    • https://static.usrfiles.com/ugd/3eed2b_3788d738962e4dbc8c84036b22cb8d20.pdf
    • https://static.usrfiles.com/ugd/1df9ea_e34e4abb1d034483972ba1215c0fee9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_6da60fc53bc84772bafbcda19175f603.pdf
    • https://static.usrfiles.com/ugd/b8c837_462a32b997ce4dbf8f8589a801444202.pdf
    • https://static.usrfiles.com/ugd/b8c837_70ecd7a810a944bd9e73a6ad259d29e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_709bbebb40af484b85921a52210b3de5.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_off00006799.bin
2ea1de4256a003108e7e9b0e7b5959900bf4fb96819b86ac9f9dece8c5844aef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6799 4956 bytes
font_01_sfnt_off00007893.bin
e648fc9fef6ee33906d3a926de5a4fcb6687c62923f4a09b8035452eb5817b7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7893 10344 bytes

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