PDF malware analysis — malicious · 550006550bd6ed52

MALICIOUS

PDF

49.3 KB Created: 2020-08-29 18:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 36b1d229d7c2e348192e276775cf5cd5 SHA-1: 6b5d7beb53a5be3ec8a69870df09f7696881cb80 SHA-256: 550006550bd6ed52e7d6cc139810f6ea4ab0faf03f892704ba79823a6c9864a5

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems T1059.001 PowerShell

The PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF SEO link farm, with numerous external links. The primary malicious IOC is the URL 'https://ttraff.ru/wix?keyword=no+niggaaaa+original+vine', which is associated with malicious redirector activity.

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=no+niggaaaa+original+vine
- https://static.usrfiles.com/ugd/b8c837_e35fb9174f764b579e129f622a8f2444.pdf
- https://static.usrfiles.com/ugd/b8c837_ebde97c9831a409f89ba9c58fb04b2ee.pdf
- https://static.usrfiles.com/ugd/b8c837_b7db22527f214238a72c8174f861dad6.pdf
- https://static.usrfiles.com/ugd/b8c837_597443141cdd4dd08befe21a0b7ad014.pdf
- https://static.usrfiles.com/ugd/b8c837_14dec97735fa48d18d97a2085a82bd09.pdf
- https://static.usrfiles.com/ugd/d01287_aacb25c6ecff4cdc962175f0b963f1ed.pdf
- https://static.usrfiles.com/ugd/b8c837_72cc9411a6e04e4992ef968791678a7a.pdf
- https://static.usrfiles.com/ugd/b8c837_e1883669ff4c45148f125acd4cf4194b.pdf
- https://static.usrfiles.com/ugd/b8c837_627bd5e6270a411586a7054f928fac01.pdf
- https://static.usrfiles.com/ugd/79e0dc_83ef7def3d4742e3ab82ae4f9d122d24.pdf
- https://static.usrfiles.com/ugd/b8c837_efec9eb68e56477fb6a6a8eed6735244.pdf
- https://cdn.shopify.com/s/files/1/0438/7844/9307/files/99_lexus_es300.pdf
- https://cdn.shopify.com/s/files/1/0436/2017/1936/files/puwevetoponeposugir.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_off0000835c.bin` `69341023df8133d0ea4a8db1c8b3c909965f64b2634f83c9161c8046c63a938f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x835C	4704 bytes
`font_01_sfnt_off00009374.bin` `86ecd91baa45a83b8ef9fcef9cd840b3e6a0a2b8a31aec77543f555f26583f8b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9374	10944 bytes

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