Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52fd0f2df43b4d2…

MALICIOUS

PDF

41.8 KB Created: 2020-08-31 04:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04b7ad6a6fe64a39b3488b8854aca1a7 SHA-1: bb5abef234d6f3dc3841646963ce6b73b5fc8bdc SHA-256: f52fd0f2df43b4d213d2ef1bdd23d639ec001d07d8a29f6ed257f0d7dd342537
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 embedded external links, indicating a link farm. The primary malicious URL identified is ttraff.cc, which is known for redirecting to malicious content. The document body contains garbled text but also includes the suspicious URL and other PDF links, suggesting an attempt to disguise or distribute these links.

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.cc/wix?keyword=rear+engine+trike
    • https://cdn.shopify.com/s/files/1/0434/7396/1125/files/7774275047.pdf
    • https://cdn.shopify.com/s/files/1/0443/4529/5004/files/gesurugajisurenafan.pdf
    • https://cdn.shopify.com/s/files/1/0433/1316/8542/files/rativeputarixikawasute.pdf
    • https://cdn.shopify.com/s/files/1/0440/5841/1158/files/kimeziworogaviverigefevud.pdf
    • https://static.usrfiles.com/ugd/50c35f_b5efcde49df643fbac114c51dc633a10.pdf
    • https://static.usrfiles.com/ugd/6cfc61_106eadcf3818493286af95f8e1bc231d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1dce4846a3a849f1ab492667eb27d0f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_3905be4b457444fa9f0e98a4d2f747d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_a204aadcb32040fea2a3631dabc818db.pdf
    • https://static.usrfiles.com/ugd/2274a7_4a768de127c8492685c6bce71c91c8d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5b6b2e2ebab4cee956829f534e28626.pdf
    • https://static.usrfiles.com/ugd/9d869b_a763c579a8ae4ae289d400d54521ff73.pdf
    • https://static.usrfiles.com/ugd/906e9f_663995d93f26406f9a2efb2cd4c6241b.pdf
    • https://static.usrfiles.com/ugd/db1da1_1246780d12374c40a8974e777900d24b.pdf
    • https://static.usrfiles.com/ugd/e745be_a70dc0f2909e4a799cb5a4d49bbb3231.pdf
    • https://static.usrfiles.com/ugd/9757e7_d0b68eba4653419580b38cd262d91271.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_off000065df.bin
b8fe4a0332ed992c714f7ac281636870cabe02b6018b3818678cab3c642c05d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65DF 4716 bytes
font_01_sfnt_off00007601.bin
1d789f43f3b63d661695f9274014805943b0fa0b871241d17749ae6bc011a4a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7601 10748 bytes

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