PDF malware analysis — malicious · deebac4e50411caf

MALICIOUS

PDF

33.9 KB Created: 2020-08-29 11:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2fc359ae794bdc58d7d4088eaf93f1b2 SHA-1: 972c98bb271b219448b36ab5f7e1a9d36cf00334 SHA-256: deebac4e50411caf91602798ea6801e744b1810214b8cc73ada26a91d50b2bc3

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 critical link pointing to a known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=kana+boon+yura+yura+mp3'. The document body, though partially corrupted, also contains this URL, suggesting a lure to a malicious site. The ML classifier strongly supports the malicious verdict.

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=kana+boon+yura+yura+mp3
- https://static.usrfiles.com/ugd/b8c837_42b3eb17a62e43d0b5da226daf5f54b5.pdf
- https://static.usrfiles.com/ugd/b8c837_1b3c90cb8c22434b8852da9e8156bf83.pdf
- https://static.usrfiles.com/ugd/b8c837_fc8c2cb50eb44ad7bc8a04a14cb559bd.pdf
- https://static.usrfiles.com/ugd/b8c837_3af5d69f79524033a29d31b85a9af94a.pdf
- https://static.usrfiles.com/ugd/b8c837_37a6778038a94cb880c68e7634b9672e.pdf
- https://cdn.shopify.com/s/files/1/0430/2834/9079/files/fetigavu.pdf
- https://cdn.shopify.com/s/files/1/0429/4174/3263/files/fuvagaduwemazobi.pdf
- https://static.usrfiles.com/ugd/22739b_da587e4772434d768b700596277ccc8f.pdf
- https://static.usrfiles.com/ugd/b8c837_4ddf75126f074b07850168014014df2d.pdf
- https://cdn.shopify.com/s/files/1/0459/9382/0327/files/mathworksheetsland_dilations_and_scale_factors_answers.pdf
- https://cdn.shopify.com/s/files/1/0436/5172/7513/files/18782684227.pdf
- https://cdn.shopify.com/s/files/1/0438/7789/2251/files/zamotisilew.pdf
- https://cdn.shopify.com/s/files/1/0434/7353/5142/files/26468678047.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_off00004525.bin` `7512e7baf538b898b5effbd3842c6d859959a14d3c84ec1cb4b3f460a9e03597`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4525	5128 bytes
`font_01_sfnt_off0000568d.bin` `25b4a5ccb4562c0c001060ece0b57ece4b46680dc677b7d6e01f1cf9dad15ec8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x568D	11044 bytes

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