PDF malware analysis — malicious · 85c16dae9524820f

MALICIOUS

PDF

54.1 KB Created: 2020-08-29 01:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 6552086721f0c3ae2ae3b66562f53393 SHA-1: 382861efc94efcd492bb98483b9a2648985223ca SHA-256: 85c16dae9524820fc7537c19b3697177b0488d415192e3adb748a6b3710951d5

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wix?keyword=file+system+forensic+analysis+pdf, which is flagged as malicious. This suggests a social engineering attack where the user is tricked into clicking the link under the guise of legitimate content. The presence of numerous other links to static.usrfiles.com indicates a link farm strategy, likely to improve search engine ranking or distribute traffic.

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=file+system+forensic+analysis+pdf
- https://static.usrfiles.com/ugd/b8c837_6b8d4db34fb94d73a78dfc389e551d89.pdf
- https://static.usrfiles.com/ugd/b8c837_82679c4eabfb46a6a021c3e3b9e10dbd.pdf
- https://static.usrfiles.com/ugd/b8c837_2a94f739d6e941dbae269390221e042c.pdf
- https://static.usrfiles.com/ugd/b8c837_bb14eaa8021b4ea0883159d0c61abaf0.pdf
- https://static.usrfiles.com/ugd/b8c837_0e60ee4fc6f5484e9be09e64f796be54.pdf
- https://static.usrfiles.com/ugd/b8c837_6b1e24127d5c4175b889c175a960c520.pdf
- https://static.usrfiles.com/ugd/b8c837_72114670a1974d5293f12dccec51f90e.pdf
- https://static.usrfiles.com/ugd/b8c837_25c13feeb3984f12b9e95bd3a6e0c349.pdf
- https://static.usrfiles.com/ugd/b8c837_782299235530450c9058303eeaf824af.pdf
- https://static.usrfiles.com/ugd/b8c837_76443480bbf3494984007c5acb6a9850.pdf
- https://static.usrfiles.com/ugd/b8c837_b18c0ffc66744c3c871f2457452c1d9d.pdf
- https://static.usrfiles.com/ugd/b8c837_06c94ce8b47e43228f51319a208a66f1.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.

Filename	Kind	Source	Size
`font_00_sfnt_off000086ad.bin` `e3a76b5ef38995ba688db24a8ee952be9eed56494b3968170d6053e8991cc36f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86AD	5148 bytes
`font_01_sfnt_off0000981b.bin` `7e30497c69fff56c60ce5f15291922f7a9f0a0ac8b50ce1ee5e33057d0ee1619`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x981B	11236 bytes
`font_02_sfnt_off0000bdee.bin` `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBDEE	4324 bytes

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