Malicious PDF — malware analysis report

Static analysis result for SHA-256 a37560d3293e550e…

MALICIOUS

PDF

41.0 KB Created: 2020-08-30 12:39:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85fa3397f25dfe4ecd13922330ab0669 SHA-1: 0c988e9fd4df80a39d7468c527ec4ab399beb19d SHA-256: a37560d3293e550e6a6f81f312c17c7ace06c09d61e7c1babeeb585d51275be0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=how+to+play+guitar+pdf'. This URL is embedded within the document body, suggesting a social engineering lure to trick users into clicking it. The file also exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to benign content but serve to inflate search engine rankings. The primary malicious intent appears to be redirecting users to potentially harmful sites.

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.ru/wix?keyword=how+to+play+guitar+pdf
    • https://static.usrfiles.com/ugd/b8c837_2f6107fba7ee425ba769464669ef6d58.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2ee54eb1d86408fad4036e2234cd14b.pdf
    • https://static.usrfiles.com/ugd/b8c837_e41db60785a940b79d36a42069d4c010.pdf
    • https://cdn.shopify.com/s/files/1/0435/1387/2548/files/third_grade_grammar_worksheets_free_printable.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1641/files/xakimomivox.pdf
    • https://static.usrfiles.com/ugd/d162e3_70298bb2bb79485fb9cbdf842e87b828.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_64cb7f5d5b1e4d0ca5dbcedb5ebe6914.pdf
    • https://static.usrfiles.com/ugd/7198c1_7f9a6cd3886b499aab8df723e0de6eb0.pdf
    • https://static.usrfiles.com/ugd/3aee12_ce3a815cb29d436f965f20ba925f5338.pdf
    • https://static.usrfiles.com/ugd/69b86f_553d35c91b9846b0b26acfa1f2e856a8.pdf
    • https://static.usrfiles.com/ugd/b58d21_63f4f010261d4fb299ee5799e15fc215.pdf
    • https://static.usrfiles.com/ugd/b52961_c3d0ca17fe01420e99ae09999c3c7bb7.pdf
    • https://static.usrfiles.com/ugd/4dd980_3b1bad6180134b4ea39dba75b6e6db83.pdf
    • https://static.usrfiles.com/ugd/10a4aa_87b0711359364254b856bd95d711e35c.pdf
    • https://static.usrfiles.com/ugd/b8c837_928da8534db641c1a63a7a9cb8334c3c.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_off0000633d.bin
c76ea7a6e1a445f9956ea50937f7b7a2fe4c44eb0531e1966839e779f7e90d52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x633D 5184 bytes
font_01_sfnt_off00007509.bin
397cfff608a89aecd889df89038be90fd2a5a57e4c55398b33793a569339ff56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7509 10216 bytes

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