PDF malware analysis — malicious · 30fba470013d4e94

MALICIOUS

PDF

42.7 KB Created: 2020-08-29 02:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cb2c2f69182a62b463477fe4096b388f SHA-1: 4010dde09198e208a93c87568360e120666eca35 SHA-256: 30fba470013d4e94e84aaae6fc8d180dd91930aef0363a7d4850ea8f54362ddd

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, one of which, https://ttraff.ru/wix?keyword=3+girls+one+guy, is flagged as a known malicious redirector. The document body, though heavily obfuscated, appears to contain this URL, suggesting a lure to external malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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.ru/wix?keyword=3+girls+one+guy
- https://static.usrfiles.com/ugd/b8c837_57d564a4fd134b08b55684e92cca70d1.pdf
- https://static.usrfiles.com/ugd/b8c837_6f1c2f6205f14e028ffd4927e95572bf.pdf
- https://static.usrfiles.com/ugd/b8c837_0bf5f0542ac040e7a0fded49a6d5ec24.pdf
- https://static.usrfiles.com/ugd/b8c837_6addfa1903ca4b7481afaf82ee466e43.pdf
- https://static.usrfiles.com/ugd/b8c837_c4cda6bd2d794ff4a1f776d213aa55d9.pdf
- https://static.usrfiles.com/ugd/b8c837_84ffaf7a36a94757a98a5ce6466eac04.pdf
- https://static.usrfiles.com/ugd/b8c837_404c24a989354ec29ef1d2ea9a374377.pdf
- https://static.usrfiles.com/ugd/b8c837_cda10bbc811843f98571a08821e9bc55.pdf
- https://static.usrfiles.com/ugd/b8c837_4509c737b75940cd924cebb50335f7df.pdf
- https://static.usrfiles.com/ugd/b8c837_ffd56b32440a4e34bbd38e19b7600c4e.pdf
- https://static.usrfiles.com/ugd/b8c837_b26f7a0d469e45d6a550604b79796a6e.pdf
- https://static.usrfiles.com/ugd/b8c837_26c2707469a849988936b790c91231cd.pdf
- https://static.usrfiles.com/ugd/b8c837_a0d0e11fb6cf43d29792f026b4d63c22.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_off00006af1.bin` `fd31465da50469bd0d511f927d14de9ee775c28a71cb4fb91eba85b93f31f245`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6AF1	4812 bytes
`font_01_sfnt_off00007b5c.bin` `f48e6eea1ed9e6c7dca5a130f4d3eee58b1188c50c6263535449fce7432bbf31`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B5C	10340 bytes

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