Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95cac0e015b9b71…

MALICIOUS

PDF

41.1 KB Created: 2020-08-10 16:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf50e3ca2512cac2adeeabd2aedfc2d8 SHA-1: e5969713f9ec7379441c8f4d1b9c6027afbd80a5 SHA-256: d95cac0e015b9b7168a8f9546bbae8ee0aaf8f30a6fe29790befe8b83f7d4d67
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link to `ttraff.ru` is flagged as a malicious redirector. The document body, though heavily corrupted, contains text fragments suggesting it is disguised as a 'math teacher resume pdf' and includes the malicious URL. This indicates the PDF is designed to lure users to malicious infrastructure, likely for a phishing or malware delivery campaign.

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.ru/pify?keyword=math+teacher+resume+pdf
    • http://files.wilderblubordercollies.com/uploads/1/3/2/6/132681307/rakopagobufep.pdf
    • http://files.maggiebathory.com/uploads/1/3/0/7/130776075/vumumizof.pdf
    • http://files.artizaninternational.com/uploads/1/3/0/7/130739593/nipekoke.pdf
    • http://files.afpneia.org/uploads/1/3/1/0/131070336/463290.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/wevuvigivapudaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9944/files/xefofagilerenomarateto.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/37429819335.pdf
    • https://cdn.shopify.com/s/files/1/0429/8588/1759/files/lg_remote_codes.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/31686983438.pdf
    • https://cdn.shopify.com/s/files/1/0437/7175/6698/files/fekinarasipeba.pdf
    • https://cdn.shopify.com/s/files/1/0451/7871/6311/files/alimentos_ricos_en_vitamina_d.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/fixirofivojoluzurodivulo.pdf
    • https://cdn.shopify.com/s/files/1/0439/5371/7406/files/83581856314.pdf
    • https://cdn.shopify.com/s/files/1/0432/7414/1864/files/ln_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/79098835214.pdf
    • https://cdn.shopify.com/s/files/1/0443/9402/1030/files/koxominuro.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_off0000612c.bin
2dc484a2183b16f0b764a8118e8552385d07e584cd49a4874e429a9cd621dbbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x612C 5368 bytes
font_01_sfnt_off00007351.bin
6d727e012ecdec88235ca602b4089ef17d3a0e38ac679115585e5471178dcac8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7351 10664 bytes

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