Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a5a705e6ac60592…

MALICIOUS

PDF

43.6 KB Created: 2020-09-02 04:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89d8eb82e6a416a656ad0434ca3069a6 SHA-1: 10d1bffc554dcc37e330abdde31f74695736c578 SHA-256: 4a5a705e6ac60592ec6e2d2f6fad2b76d289175d1a25c44e5773b81b1cec3dda
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and text related to cardiology guidelines, suggesting a social engineering lure. The presence of numerous other PDF links, many hosted on 'static.usrfiles.com', indicates a link farm strategy, likely to obscure the malicious redirector. No scripts were extracted from this sample.

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/pify?keyword=cardiology+atrial+fibrillation+guidelines
    • https://static.usrfiles.com/ugd/b88e3d_d4236b803904483a92b3f62bbe038221.pdf
    • https://static.usrfiles.com/ugd/921909_8ce15df6403643b69e42ac82eb411cce.pdf
    • https://static.usrfiles.com/ugd/b8c837_f99bd3d67a4b4b1f82edcba6edde4e40.pdf
    • https://static.usrfiles.com/ugd/db80c5_064ad5bf73124c27b003a9915f7e35ae.pdf
    • https://cdn.shopify.com/s/files/1/0433/4354/4488/files/jeretezaxadosipiboti.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_74a9a240221243d6bb483629e48a70e4.pdf
    • https://static.usrfiles.com/ugd/de9003_3294fdb728a2446a8e9aebb500eefd55.pdf
    • https://static.usrfiles.com/ugd/b8c837_1906bb1a8ecc41209f4824dbbc3168b9.pdf
    • https://cdn.shopify.com/s/files/1/0438/2726/5693/files/duwegulaxofam.pdf
    • https://cdn.shopify.com/s/files/1/0431/0319/1193/files/60210062334.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/50723116601.pdf
    • https://cdn.shopify.com/s/files/1/0437/0713/8201/files/oxitocina_y_carbetocina.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/19150381685.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_off00005fd1.bin
04585327f1478c81e6692d7956e560183b3e2108ea8a32dfdde724c36e6ab5b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD1 5224 bytes
font_01_sfnt_off000071a8.bin
0412acb9f3e599c835c7c11b921b072b7e6549704e36ffe4f12ae50d8f7179c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A8 9860 bytes
font_02_sfnt_off0000934f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x934F 4324 bytes

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