PDF malware analysis — malicious · 252549332435589e

MALICIOUS

PDF

41.0 KB Created: 2020-09-01 02:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1dcf662410da2594ff2352406d3c18f5 SHA-1: 2b781c5f700e440c4b7a970cb6761b6405ac6b66 SHA-256: 252549332435589e3f73a4a68f19cee40c817bbedeb9370cec305f10d17e71dc

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with one prominent link directing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a search query, suggesting a lure to trick users into clicking the malicious link. The ML classifier 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.me/wix?keyword=shayne+ward+breathless++mp4
- https://static.usrfiles.com/ugd/ea5d7b_43caae93f213463abc412b7e66bd1036.pdf
- https://static.usrfiles.com/ugd/857e61_1eadb01df8b24e089e383bdffccfaf71.pdf
- https://static.usrfiles.com/ugd/4b7290_50a21cd97e9544e2b89498d1595d53cd.pdf
- https://static.usrfiles.com/ugd/b8c837_a81b69b956e5473c91c32c5a7c31e113.pdf
- https://static.usrfiles.com/ugd/b8c837_7155f7c6b781428d89e675d6822e7004.pdf
- https://static.usrfiles.com/ugd/3ceeb9_073771534c60487abbf02c82281cc015.pdf
- https://static.usrfiles.com/ugd/b8c837_e9fb4bbf97cd4172a2019ae9ecb25e06.pdf
- https://static.usrfiles.com/ugd/735424_aea7746c186149cc928e703bd9809893.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevegijetowid.pdf
- https://cdn.shopify.com/s/files/1/0437/1428/1625/files/76974888722.pdf
- https://static.usrfiles.com/ugd/efb3f0_eb9ac65987574e9298d0edd1ed9fa9f5.pdf
- https://static.usrfiles.com/ugd/7a11b0_6a0b13bfae5c4af387bb8d2372612796.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004248.bin` `4a067a152c45bf32b0419239b7564db8417419e7c158c0eb32110c52d5515f76`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4248	5724 bytes
`font_01_sfnt_off000055a8.bin` `4e860d4f1588919441dce81515553767d972acc78ceb4287502b8a85667dc616`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x55A8	9940 bytes
`font_02_sfnt_off00007801.bin` `001d00114279cda904ec87ee5caf81ece5266ef333c342f0ca5ce216f4908131`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7801	18776 bytes

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