PDF malware analysis — malicious · 3cb1e301d1d8e3f1

MALICIOUS

PDF

42.9 KB Created: 2020-09-01 05:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9e716ac5faaba9b8cbb182e61f4994d2 SHA-1: 4edcd38ea7ba800c9682bee09adcf40cf144d5d9 SHA-256: 3cb1e301d1d8e3f1b964abafeb6d05f421c761a608ea9650a6527abe1551085b

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a link disguised as a manual for an Audi R8, which is a common lure for phishing or malware delivery. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms that the embedded URL, https://ttraff.ru/wix?keyword=audi+r8+spyder+ride+on+manual, points to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious link is sufficient for a high-confidence assessment.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.ru/wix?keyword=audi+r8+spyder+ride+on+manual
- https://static.usrfiles.com/ugd/aef5b7_020244f2bdc44be5adb8a4ace7bfbc4e.pdf
- https://static.usrfiles.com/ugd/4d6844_f62bc1b1082b4ca7b77dfbb358d8e9df.pdf
- https://static.usrfiles.com/ugd/9ec29b_6d30cc359b7645c5b4380ce1229840dc.pdf
- https://static.usrfiles.com/ugd/6d59ab_267ba6ac29124fbc94b97ac297e97da3.pdf
- https://static.usrfiles.com/ugd/b8c837_571338f8de2840c8824c13cd15b6d5be.pdf
- https://static.usrfiles.com/ugd/b8c837_d5c2cf93c6d043be8a06f2c6d6083b17.pdf
- https://static.usrfiles.com/ugd/9e53d4_8264df6684e74030ab2c5bdb86102902.pdf
- https://static.usrfiles.com/ugd/b8c837_31facdb28ae3470c841cfb5e3d84d451.pdf
- https://static.usrfiles.com/ugd/0cd3a8_b2a35628b2e24da387c5a72532ddcd56.pdf
- https://static.usrfiles.com/ugd/0c268c_92344a8292cc49e6919ba63f657f2a4b.pdf
- https://static.usrfiles.com/ugd/49be48_66da6397a75c48f1ba14f6c95e8d03cb.pdf
- https://static.usrfiles.com/ugd/b9801a_e8d1205ecf224d0d92d307b795abb813.pdf
- https://static.usrfiles.com/ugd/97493d_7f60471e9ac84ea2a7b205108ed23e69.pdf
- https://static.usrfiles.com/ugd/badafb_1f53bceab8f24e58a5183aa355f07b3a.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_off000069f1.bin` `3abdd376262fbbce80a338162f281616d0d524df7d0b2d8b35ae1bac8419f0cc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x69F1	5388 bytes
`font_01_sfnt_off00007c31.bin` `8cd9deb04b869b3dd063732cce4d72554eb4b357dfc678357e5375c1d29bcbf1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C31	10120 bytes

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