Malicious PDF — malware analysis report

Static analysis result for SHA-256 543bbdd7357f642a…

MALICIOUS

PDF

40.2 KB Created: 2020-08-29 13:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81ca96121c172e574ac9baa95d0fc474 SHA-1: 5f1765b093e468ead93cfa97a6661674f71c7a92 SHA-256: 543bbdd7357f642af0a051f4843f23ea395724bbf0a41cf5a3d3d7e8e5fde319
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=windows+vista+ultimate+32+bit+iso+do'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of embedded links, with the first being 'https://cdn.shopify.com/s/files/1/0429/9482/7418/files/52497866023.pdf'. The presence of a low-severity heuristic for a 'download button' further supports the idea that the document is designed to trick the user into clicking malicious links.

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.com/wix?keyword=windows+vista+ultimate+32+bit+iso+do
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/52497866023.pdf
    • https://cdn.shopify.com/s/files/1/0437/8365/1490/files/journal_ennahar_dz.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0805/files/77508174155.pdf
    • https://cdn.shopify.com/s/files/1/0430/7851/6885/files/rubidibamasadurotili.pdf
    • https://static.usrfiles.com/ugd/b8c837_a81b69b956e5473c91c32c5a7c31e113.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d8fbc47cf994df08f2ab03af395cb97.pdf
    • https://static.usrfiles.com/ugd/b8c837_30f0b9498ab942609b3804b5a998672c.pdf
    • https://static.usrfiles.com/ugd/b8c837_77ca199deae448acbbea2621e45f71ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7cc99874ed64601ab3f186fd024d79d.pdf
    • https://static.usrfiles.com/ugd/b8c837_66bfb316dbda4af18f4cef2f5d080f75.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea3742cd8f644fc99f78fa4b15bf0c61.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_off00005ea2.bin
294e3217109fe8e2b0f75212e4c00e590c442e15504e31b86cb61448d7f2647f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA2 5476 bytes
font_01_sfnt_off0000714e.bin
c5383b55f3bfb3ea7e89ea3d93af35c3ebb098216e21fde79fc5595ce0fdb398		 pdf-font-stream PDF embedded font (sfnt) at offset 0x714E 10296 bytes

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