Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb4ff374ca20db6…

MALICIOUS

PDF

39.5 KB Created: 2020-08-31 08:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c40407cda708ca948ea03e555294ed69 SHA-1: 9bef3015beba4e61a7115c7c335b20b6f5a78644 SHA-256: 9cb4ff374ca20db662bda9e3461b2b401c583136a5beee7b8c6b3e922cf18fa9
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily corrupted, contains text related to a car part and the malicious URL, suggesting a lure to a scam or phishing site. 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=e60+m5+manual+gearbox+for+sale
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/scantron_performance_series.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/perodesuli.pdf
    • https://cdn.shopify.com/s/files/1/0438/3290/1789/files/jaxomusutazukoxire.pdf
    • https://cdn.shopify.com/s/files/1/0430/2284/4067/files/64809534711.pdf
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/lepitodubejaxale.pdf
    • https://static.usrfiles.com/ugd/b8c837_3430b57eb72440158e15e13c15b71568.pdf
    • https://static.usrfiles.com/ugd/83f04e_55589ce7ac23429faa70044759814eb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_dce6b614c31746b3a4c9b72b73c21fbc.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff662c6cdc9d4257bf3d453a4edc1d88.pdf
    • https://static.usrfiles.com/ugd/b8c837_65b630379da3491ab4784af37e4b5ad0.pdf
    • https://static.usrfiles.com/ugd/dd4472_5fbb1a373b5049c19d654bf086a48051.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6ed77a08ea746e39774dbfc7ea47fd7.pdf
    • https://static.usrfiles.com/ugd/d01287_1d75fa74e168415ca2e81f131c3eea58.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2e86cd413ae45dab10e03ad0104040a.pdf
    • https://static.usrfiles.com/ugd/e33828_9a3f4990197540a6b307cbb4dbe8f6d9.pdf
    • https://static.usrfiles.com/ugd/d4579c_9b7c2b5b20264685a99d6b6b77218a2d.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_off000059c8.bin
352aa07e86b538bb436585a6ba71fcde62309e72fc49f701f47559d5f90c2720		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59C8 5672 bytes
font_01_sfnt_off00006cf8.bin
d89818d025aea66f355b3c02ebfef1f1de0d5b8da4a6b037d0a1a5d0cdc634ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF8 10728 bytes

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