Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d434268917afba6…

MALICIOUS

PDF

76.4 KB Created: 2020-08-30 13:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0144aebbc9c29a810b47caf94918d1ed SHA-1: 197b6fa0d6fdcdcf16465c221e864e4c2705eab8 SHA-256: 4d434268917afba62a90bccca2a75014d4d66d1c46e74d2911778d2352f27e82
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.ru/wix?keyword=que+es+el+meif'. The document also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful sites.

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/wix?keyword=que+es+el+meif
    • https://cdn.shopify.com/s/files/1/0448/5444/4193/files/asset_integrity_management.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/ruxivisixerabozogutika.pdf
    • https://cdn.shopify.com/s/files/1/0440/8547/7541/files/rofatolefemibuxudevimes.pdf
    • https://cdn.shopify.com/s/files/1/0439/5932/0734/files/39080186643.pdf
    • https://cdn.shopify.com/s/files/1/0447/0325/2636/files/jawelatunuwirunixave.pdf
    • https://cdn.shopify.com/s/files/1/0434/0406/6983/files/16549625140.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5591/files/26511137743.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/9798564711.pdf
    • https://cdn.shopify.com/s/files/1/0437/8909/0977/files/95596673348.pdf
    • https://cdn.shopify.com/s/files/1/0434/1356/9687/files/buy_trenbolone_enanthate.pdf
    • https://cdn.shopify.com/s/files/1/0435/9022/1983/files/beamforming_mic_array_2_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0439/6302/3518/files/64014352586.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8543f49da794d3c97b79c8ee397ac57.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b05a0a6ff51488e9516e0d1cbbee83e.pdf
    • https://static.usrfiles.com/ugd/5438e3_5079e28f1d5f4519bebb453e9600fb11.pdf
    • https://static.usrfiles.com/ugd/32777b_6a65190dca484b0cb9757eeab2b2c8d6.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_e2ebe399fefd45e68e9578d55e99c80f.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_off0000e60c.bin
3f99dcc919e726cc88f0764c21144354e71cc6a9df5a6abcfd1640462095e216
pdf-font-stream PDF embedded font (sfnt) at offset 0xE60C 4668 bytes
font_01_sfnt_off0000f5e4.bin
91c9675c5718b4c93daff6c5c503b40b69211aa5d7c5d2b4661ad43e579cc551
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E4 14964 bytes