Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa64c2c072ba9c2…

MALICIOUS

PDF

41.4 KB Created: 2020-08-31 04:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a42d3c77b503e6818b598ce1da7bf56 SHA-1: 84a6d2b5808774f2e2a83de3ebcb1faaac941be3 SHA-256: eaa64c2c072ba9c21239c2a9d94f403283924f2a3d7a21ecc21376e86546b34d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used to create link farms for SEO manipulation or to distribute malicious content. One of the embedded URLs, 'https://ttraff.com/wix?keyword=les+cahiers+de+douai+themes+principaux', is flagged as a known malicious redirector. The document body itself is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, suggesting it's not a typical user-facing document but rather a container for the malicious links.

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=les+cahiers+de+douai+themes+principaux
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rosetotirumeza.pdf
    • https://cdn.shopify.com/s/files/1/0429/2447/4531/files/brabanonne_paroles.pdf
    • https://cdn.shopify.com/s/files/1/0434/0822/8508/files/can_i_find_my_old_myspace.pdf
    • https://cdn.shopify.com/s/files/1/0463/1196/4829/files/hard_fraction_worksheets.pdf
    • https://static.usrfiles.com/ugd/f4de5e_22067e88ebd947e1aa3feed4315c1cd5.pdf
    • https://static.usrfiles.com/ugd/fd30ac_946cfaa4432949e8a9688892918d2639.pdf
    • https://cdn.shopify.com/s/files/1/0436/1083/3058/files/87579983098.pdf
    • https://cdn.shopify.com/s/files/1/0437/2506/2298/files/arabian_nights_aladdin_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7579/files/25635948710.pdf
    • https://static.usrfiles.com/ugd/b8c837_38c043821084448fb437f6f658a03275.pdf
    • https://static.usrfiles.com/ugd/24853a_3100c4a2e8f543338f8f4bfe8e15d876.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_off00005f75.bin
9cbb1192d4f13f188c0fbc742017ec07200472625a5a9f41ec3871b02506fb52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F75 5288 bytes
font_01_sfnt_off00007148.bin
0b69697ac317656fac92bb79e1e225e98237be2be13dfd2f722e9480cb3da0a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7148 12312 bytes

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