PDF malware analysis — malicious · 231ae995d3f7effc

MALICIOUS

PDF

43.9 KB Created: 2020-08-30 13:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: faf4bef0fdfac4d6af8e2ea54db78201 SHA-1: 922c8b1f28cbdb5c836dfe9dec9237ca8090b522 SHA-256: 231ae995d3f7effc72bfbfd30f6c384a27497bbcc105d98681c7993f0e98cd19

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links, one of which, https://ttraff.club/wix?keyword=ozark+trail+yurt+tent+instructions, is identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'Ozark trail yurt tent instructions', suggesting a social engineering tactic to encourage link clicks. The presence of a large number of external PDF links further indicates a link farm, a common technique for SEO poisoning or distributing malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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.club/wix?keyword=ozark+trail+yurt+tent+instructions
- https://static.usrfiles.com/ugd/1f2646_20c326442a3044df9e6f25fe2dd15b44.pdf
- https://static.usrfiles.com/ugd/9b7d8a_1924a25b92b6400ea6d3af7361f11b33.pdf
- https://static.usrfiles.com/ugd/b8c837_c951c817625f4eaab032288f870db976.pdf
- https://static.usrfiles.com/ugd/b8c837_ec97949417784b42addb4dcfc33af21e.pdf
- https://static.usrfiles.com/ugd/b8c837_96ca8690fda74c27bbbcaf388d325fc6.pdf
- https://static.usrfiles.com/ugd/ed64d2_1c2700bf8a7a4146a9cdfef80b505a91.pdf
- https://static.usrfiles.com/ugd/a86d68_3e5883a412dd474ca417a96dfeadae66.pdf
- https://static.usrfiles.com/ugd/b8c837_91e4018619774e77beeeb540e1b5da8e.pdf
- https://static.usrfiles.com/ugd/c5d40f_3351955e7f874fcc99cf8b060b37048f.pdf
- https://static.usrfiles.com/ugd/b8c837_1a9a94e16e1245bf9f198ea971a5db30.pdf
- https://static.usrfiles.com/ugd/fb83f1_9aa3059089064741bdf0aba12e0d6797.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00006e68.bin` `7cda3b7145a7919f77fac0c598cf5e8cc3d5e664d0a209185c20050d7f952fac`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6E68	5036 bytes
`font_01_sfnt_off00007fa9.bin` `083a73ca0725066bca6f6ecd9d2d2cee23a5dcfddf3f030c3c870cf39eb580ab`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7FA9	10400 bytes

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