Malicious PDF — malware analysis report

Static analysis result for SHA-256 c42eb29350e69033…

MALICIOUS

PDF

39.3 KB Created: 2020-08-31 04:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fccdfcb8a449bcdc86b22184a7e1d9b7 SHA-1: f052ee4548ecacf4e09ef251f2535dc8f9971904 SHA-256: c42eb29350e6903350c0405f24fa6109e83e830b174f38fbcb9be8f49e6c6884
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link leads to a suspicious domain. The presence of a 'download button' lure further supports a phishing or scam attempt.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/wix?keyword=how+to+convert+a+pdf+file+to+a+fillable+form
    • https://static.usrfiles.com/ugd/18122d_88a85ba1aa5d4eaeb0c758dfafac5dcf.pdf
    • https://static.usrfiles.com/ugd/b8c837_591654e411f94a9eab90d94087a75b17.pdf
    • https://static.usrfiles.com/ugd/b8c837_9640a64df9af446fa944510dea9e17fd.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/69502762241.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/76487490741.pdf
    • https://cdn.shopify.com/s/files/1/0438/1140/5986/files/2680602105.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/clasificacin_de_anemias_oms.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2053/files/91161573794.pdf
    • https://cdn.shopify.com/s/files/1/0452/1938/1399/files/dahua_catalog.pdf
    • https://static.usrfiles.com/ugd/b65acf_3df8c159fff04f13be74148f6221a612.pdf
    • https://static.usrfiles.com/ugd/b65acf_4019130cf34341949bf2bf74e5b8b0f4.pdf
    • https://static.usrfiles.com/ugd/cb5dea_1b1fe6d9dd654627a3b36e0af35c7eb6.pdf
    • https://static.usrfiles.com/ugd/f46427_6d2a89c8d2df4306985994545f88e3ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f72ec573f884ae893bda899ac3d085f.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_off00005c31.bin
84e552747baff0057dd65a54b752be455060da395f7d93a98fd3a556e9033991		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C31 5376 bytes
font_01_sfnt_off00006e69.bin
7687bf0db4a8fe928bd5a2d33508dc8eb0af7e20d22c27bd52cf8b037c112ab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E69 10008 bytes

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