PDF malware analysis — malicious · 79a2c993fbe6f13b

MALICIOUS

PDF

41.1 KB Created: 2020-08-31 09:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 267904481221feb015a1b8aeb4ff0aab SHA-1: 66248e396326933d6e6b57e17592cde77bad5ad8 SHA-256: 79a2c993fbe6f13b6e00dac9072baa7e25eb7502bfee5fbda5ea60539de7447a

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is `https://ttraff.ru/wix?keyword=ch%25C3%25A2teau+jamin+2009`, which is likely used to direct users to a compromised website. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent.

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=ch%25C3%25A2teau+jamin+2009
- https://static.usrfiles.com/ugd/b8c837_c0baa625869d476482b5754e6ae6e8d8.pdf
- https://static.usrfiles.com/ugd/ee9d3f_992648b34a7b41f9b215d2132bc5a1cb.pdf
- https://static.usrfiles.com/ugd/96768c_e6f23304faa64e0cbefc3c8e307b56df.pdf
- https://static.usrfiles.com/ugd/b8c837_910c8692a0a848e5a20d7019f2cafdaa.pdf
- https://static.usrfiles.com/ugd/b91566_939c41ef989d4131b9b6f935e58611ae.pdf
- https://static.usrfiles.com/ugd/409ca8_6a92c96b550240f68e7900dae057060b.pdf
- https://cdn.shopify.com/s/files/1/0435/3068/2519/files/8._2_chlorophyll_and_chloroplasts_worksheet_answers.pdf
- https://cdn.shopify.com/s/files/1/0432/7905/7056/files/letutewasavupozuvi.pdf
- https://static.usrfiles.com/ugd/b8c837_2947135ea2b241ec82552138cf8ab89a.pdf
- https://static.usrfiles.com/ugd/0adedf_fe04c415b9e546b6988c3b1c7ec25abe.pdf
- https://static.usrfiles.com/ugd/b8c837_0d73edd628ee4265a8e5469ac2b3166e.pdf
- https://static.usrfiles.com/ugd/b8c837_e7472894cf8c4921895d0f1fdb15bfad.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_off0000602a.bin` `5899654b81eff76b2fff6d9516e123a5c4c6466ccdb02d1925e1733cb74d296e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x602A	5268 bytes
`font_01_sfnt_off00007175.bin` `7b31a52aa08e04d93dc4fb244ab71d146f635ba20ee64324e69295f5474e43a5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7175	11556 bytes

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