Malicious PDF — malware analysis report

Static analysis result for SHA-256 32cd654425aca6cd…

MALICIOUS

PDF

44.6 KB Created: 2020-08-30 10:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bff42b28665738a3c6072109916fc851 SHA-1: 1c7863aa2c00b33cd6dacdf40c151b4b53f200ee SHA-256: 32cd654425aca6cdea9c194547ab09ef290c319b48235438c88581bebbfdb534
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. This URL is presented within the document body, disguised as a Suzuki motorcycles service manual. The PDF also contains a link farm heuristic, indicating a large number of external links, many of which point to 'static.usrfiles.com'. The ML classifier strongly flagged this PDF as malicious.

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/wix?keyword=suzuki+motorcycles+service+manual
    • https://static.usrfiles.com/ugd/ace02d_06b303b28b59468cafa2193de0994c64.pdf
    • https://static.usrfiles.com/ugd/6da380_b678d9663aa1432d9f333eeb25869f1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_df0594bf9dcc475f9739fd2f7802f66a.pdf
    • https://static.usrfiles.com/ugd/8b9728_889561c57a9b496595239df8fcb9f0b3.pdf
    • https://static.usrfiles.com/ugd/516574_43bcd98729e345a387b20ac5a871b8b3.pdf
    • https://static.usrfiles.com/ugd/fd30ac_c410e8f62da84d668439459a9ce01f37.pdf
    • https://static.usrfiles.com/ugd/9374a7_be47cd7cc5fa49aaa6b0a57a69743280.pdf
    • https://static.usrfiles.com/ugd/b8c837_14492a5b817b407e9619eeece6462cb9.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6337/files/kopaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/5403/0231/files/10610418495.pdf
    • https://cdn.shopify.com/s/files/1/0433/1179/2286/files/79401165623.pdf
    • https://cdn.shopify.com/s/files/1/0440/8098/8310/files/model_proces_verbal_constatare_abate.pdf
    • https://cdn.shopify.com/s/files/1/0434/3876/8284/files/razanirilumotosuzamerogup.pdf
    • https://cdn.shopify.com/s/files/1/0433/7405/1493/files/petzl_climbing_harness_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/zafinagatamajiwemaw.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_off00006d9b.bin
28a024a394d6cb391cb039eb4339525ba341a90563fde4b38a89678384ffa071		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9B 5324 bytes
font_01_sfnt_off00007fb5.bin
74f1e8ad3177f8b1fab865fefb6001a26f74e7c1228d2fd069cad9a2d61fde31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB5 11428 bytes

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