Malicious PDF — malware analysis report

Static analysis result for SHA-256 c45b76422bac1d3f…

MALICIOUS

PDF

48.4 KB Created: 2020-08-31 14:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01045c5adf55fc76692394c2d86aafe7 SHA-1: 5769d6b3e6751b4bf4a1f83f7059b03d7c2f1d9d SHA-256: c45b76422bac1d3f14e7ec14fd45c5de4e3ee5d7383e31a04c9f1201ed1573ae
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicative of a link farm. The primary malicious URL identified is https://ttraff.me/pify?keyword=tableau+d%2527+amortissement+d%25C3%25A9gressif+pdf, which is likely used to redirect users to a malicious destination. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent.

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.me/pify?keyword=tableau+d%2527+amortissement+d%25C3%25A9gressif+pdf
    • https://static.usrfiles.com/ugd/44b221_e3c1cc0aa16d450194ed45611b6bf557.pdf
    • https://static.usrfiles.com/ugd/362633_ab728a7f370a417bbf98f05ca073c953.pdf
    • https://static.usrfiles.com/ugd/191a6d_55fd9374d8f04d17b82ce11e7bf41812.pdf
    • https://static.usrfiles.com/ugd/29c71c_ce716b83bcc542a4ac76b438050a7de6.pdf
    • https://static.usrfiles.com/ugd/0a052f_f6ea1b9c8e054139915c6a4e6a03f319.pdf
    • https://static.usrfiles.com/ugd/b8c837_5499244c1e324821b1d722226c25bdcf.pdf
    • https://static.usrfiles.com/ugd/271e65_564c0bf3d08b49de9e9996a27bedddd3.pdf
    • https://static.usrfiles.com/ugd/3b7182_6b7f9406794c4b5aa25988f502a2053e.pdf
    • https://cdn.shopify.com/s/files/1/0431/5109/8007/files/being_charlie_full_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/8570/9987/files/lovuzoduwatefodademeluz.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/xijakovubanuzoj.pdf
    • https://static.usrfiles.com/ugd/696117_3cbd1b4d2f3c4da294405d6fcdb8ea77.pdf
    • https://static.usrfiles.com/ugd/b8c837_855ca7ec8356434e95e65ac1894efbc8.pdf
    • https://static.usrfiles.com/ugd/136d07_5852572d84074309bed3491f19449c8d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d359321b5fff4683a280c6921c7f4365.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_off000072a2.bin
95e648a21671e7e0ca52015cf1aabd69b2c557096719e89437cdb6d5a20a2b53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A2 5628 bytes
font_01_sfnt_off00008566.bin
2ade4a44640aa496c65703c76b003724a85e4f737d8b862981fd7969dbf83630		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8566 15148 bytes

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