Malicious PDF — malware analysis report

Static analysis result for SHA-256 9552bf21125ff398…

MALICIOUS

PDF

46.8 KB Created: 2020-09-01 08:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55a42afd8ce13390c0e15fce6a12f142 SHA-1: c74edd0c1bc92afb597dda267b35bbf4ec54bfae SHA-256: 9552bf21125ff3986818e813cfed00af40af04fe31f2a2cb7af8db41b0d024e9
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link. The embedded URL points to 'ttraff.com', which is known to host malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick the user into downloading a file presented as 'chrome.exe'. The presence of a large number of external PDF links, while some are benign, indicates a link farm strategy, likely to obscure the malicious redirector.

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/wix?keyword=chrome.+exe+latest+version+free
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/17478780052.pdf
    • https://cdn.shopify.com/s/files/1/0429/1565/9942/files/matrices_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/5919/9650/files/96882969333.pdf
    • https://static.usrfiles.com/ugd/b8c837_910e7a75e1584e87aaf707987ae68d13.pdf
    • https://static.usrfiles.com/ugd/b8c837_5924d111f715418a98d4d1b327a3dbb8.pdf
    • https://static.usrfiles.com/ugd/97493d_b68ae4ce25594f219191846483b25ece.pdf
    • https://static.usrfiles.com/ugd/3f80ec_c1eb589f373443e1b01fae3131f077c6.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_b9d907fa0b944f14bce86672cbadd42c.pdf
    • https://static.usrfiles.com/ugd/b27199_e7f00c4108c84dfcb05efa3f581dc8b5.pdf
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/risak.pdf
    • https://cdn.shopify.com/s/files/1/0430/6852/2657/files/possessive_genitive_case_exercises.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_off00006d29.bin
52da79b7469e431b719c92bd6eb9466b3d866975abf1873412ca444b2d0ef9cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D29 4980 bytes
font_01_sfnt_off00007df4.bin
74471b099bae1e81801d6129ce9904860d238393f0438c0ae16f69b3c6d316b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF4 10080 bytes
font_02_sfnt_off0000a085.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA085 4324 bytes

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