Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec29a8a605a27b7…

MALICIOUS

PDF

45.6 KB Created: 2020-09-01 05:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c261b984cacc6f9a29c3ba235a9bf5f SHA-1: ca9d0f0a14bea0bce989bbdf6a67566f19712884 SHA-256: 1ec29a8a605a27b7678fa137c6299015f0f42b782c60db7f4f8d4da0d6836872
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is disguised as a technical support lure related to 'spreadsheet compare 2013 not working'. The document body, though heavily obfuscated, contains this URL and references to wkhtmltopdf, suggesting it was generated programmatically. The presence of numerous links to static.usrfiles.com, while marked as benign, indicates a link farm strategy. The primary attack vector is likely social engineering via a deceptive link within the PDF.

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=spreadsheet+compare+2013+not+working
    • https://static.usrfiles.com/ugd/2c8d66_c080e866e87446c78f99de083771361a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a968e97c70d4bcebe8fc7b7bd7231a5.pdf
    • https://static.usrfiles.com/ugd/286fb8_15def92caed54648a597f22c30741742.pdf
    • https://static.usrfiles.com/ugd/9cc572_e0546cee7325459ca57b587c4c282138.pdf
    • https://static.usrfiles.com/ugd/99a8f2_cce0414e26e548fc923d8d3449212ac8.pdf
    • https://static.usrfiles.com/ugd/136d07_00c0e70dd4d9458da4be8ba4146fb23c.pdf
    • https://static.usrfiles.com/ugd/30e015_2f1bf627140b4f4296f6fe03ad2c3181.pdf
    • https://static.usrfiles.com/ugd/be19e1_f852490f85264a9dacfc779b74548bea.pdf
    • https://static.usrfiles.com/ugd/b8c837_de519511f77a4c08a3ccf7fc9737d993.pdf
    • https://static.usrfiles.com/ugd/b8c837_02fcd7a8c76540ff8357d32089e30245.pdf
    • https://static.usrfiles.com/ugd/6da380_1df384450f934574b2eb13e8b6d8eef0.pdf
    • https://static.usrfiles.com/ugd/0d089b_ea72037496544936a00a0d94593df890.pdf
    • https://static.usrfiles.com/ugd/c33cdb_5a0ba350ed854042af08803f918d755d.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058f7.bin
f232b6c458cba24fb7271069bd938a0486d01a26aa250fcab4c024aceaa016ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F7 6204 bytes
font_01_sfnt_off00006dff.bin
4fb4729649590e1a0093b3c7c8af28de101fe2d2b45afaac8725817d64155fd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFF 10960 bytes
font_02_sfnt_off0000939a.bin
1e129afa3190c855f651c9186708cb69c08211094e47b28d19ce6d5689b6e472		 pdf-font-stream PDF embedded font (sfnt) at offset 0x939A 16300 bytes

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