Malicious PDF — malware analysis report

Static analysis result for SHA-256 f199b397fb50c687…

MALICIOUS

PDF

45.3 KB Created: 2020-08-07 20:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baaef8ff253f5517b30d92079078d25b SHA-1: 81b5f3d42031a50a8fedf4a3882d843b5b1e3fe0 SHA-256: f199b397fb50c687751003cfd3b901f08028f9f3b9dfd13ce5332ce0bbb21d49
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=define+newspaper+pdf'. Additionally, it features a PDF link farm with numerous URLs hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the redirection attempt.

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.com/pify?keyword=define+newspaper+pdf
    • http://files.msgsocialstudies.com/uploads/1/3/1/3/131379312/ae93c.pdf
    • http://files.natonee.com/uploads/1/3/0/9/130969231/2142361.pdf
    • http://files.aandrdesignsinc.com/uploads/1/3/1/4/131454098/buxerogobalano_menegodelodukow.pdf
    • http://files.norvacentre.com/uploads/1/3/2/8/132816066/gisokulijozivo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/75138676065.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3585/files/tejijewofisafix.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/90828156047.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdf
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/fopiweva.pdf
    • https://cdn.shopify.com/s/files/1/0437/1090/6520/files/fovoguvum.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/81417935738.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/69233027053.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/64621349864.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xozujegemuzudileruzodedus.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/huffman_encoding_python.pdf
    • https://cdn.shopify.com/s/files/1/0433/8129/3221/files/donuxolutogopigazedol.pdf
    • https://cdn.shopify.com/s/files/1/0432/6260/7518/files/34390188716.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/
    • https://cdn.shopify.com/s/files/1/0429/8607

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067a8.bin
f42fdb478e4a1ec4a511e405355a4487934ecdc9a708bce3a912a3cf00d4f175
pdf-font-stream PDF embedded font (sfnt) at offset 0x67A8 4692 bytes
font_01_sfnt_off000077b0.bin
4a8883261bb078a01e7e032a33f918305cc9fa6b3dd4e0bc6fae3ad358990ab4
pdf-font-stream PDF embedded font (sfnt) at offset 0x77B0 10032 bytes
font_02_sfnt_off00009a07.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A07 4324 bytes