PDF malware analysis — malicious · 350f0bfbe9ad9735

MALICIOUS

PDF

65.2 KB Created: 2020-08-31 16:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 39b2da43db979befc09f52f10df6587f SHA-1: 218ba5d3cd089d79f24716756f625ce31729533b SHA-256: 350f0bfbe9ad9735c6d82959f94843123b68d1c3f8715ecfd93120dc6da3e0cf

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=nbc+news+reporter+female'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing its role in the attack. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wix?keyword=nbc+news+reporter+female
- https://static.usrfiles.com/ugd/cafc24_5c510feb16154c539c6dd6f9a5bcbb69.pdf
- https://static.usrfiles.com/ugd/71fd01_81b10366cea14bb9be61374f1ed5becb.pdf
- https://static.usrfiles.com/ugd/856cea_cfb93803e9394f0492bbb11e1eabae0e.pdf
- https://static.usrfiles.com/ugd/7c30af_67bdf97d568b4cf389947870f159fe0a.pdf
- https://cdn.shopify.com/s/files/1/0434/2880/6808/files/rapirepun.pdf
- https://cdn.shopify.com/s/files/1/0427/9926/8003/files/72903863390.pdf
- https://cdn.shopify.com/s/files/1/0430/4447/0945/files/11228270549.pdf
- https://cdn.shopify.com/s/files/1/0445/3220/3679/files/autodwg_to_dwg_converter.pdf
- https://cdn.shopify.com/s/files/1/0430/0016/8597/files/dinezif.pdf
- https://static.usrfiles.com/ugd/b8c837_f702f7ca07b3449f80b3d98b7fa04ab3.pdf
- https://static.usrfiles.com/ugd/defcb2_00ecde65ddfd4794afa88df49c7a44fc.pdf
- https://static.usrfiles.com/ugd/5ed537_ded5ac7dc3e04e5a9cfd97082582f29e.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/
- https://static.usrfiles.com/ugd/b8c837_f702f7ca07b3449f80b3d98

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c10c.bin` `7f20daa7fc7f316ffb554152e89eb6da2354f40c80656d5beb9a24d8c685a882`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC10C	5364 bytes
`font_01_sfnt_off0000d346.bin` `8d7f22ffc3c7a3a2d2c06d60947f9a4c91faf3d2e6344ea7ddecda23f95c31ee`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD346	10848 bytes

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