PDF malware analysis — malicious · 910f6254520fe838

MALICIOUS

PDF

34.7 KB Created: 2020-08-29 16:37:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: dfeb2ebfd8a2ecf668d6c4e555a20d5a SHA-1: e98ac5d1d8c30dbecc5f552e8767f80eb029d182 SHA-256: 910f6254520fe83831c96f9a60b62cbb99c866865af7c9aef5a74da5e66a3278

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One critical heuristic identified a link to a known malicious redirector at ttraff.com, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the target URL, suggesting a lure to a malicious site disguised as information about TV codes.

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.com/wix?keyword=emerson+pl-p42w-10a+tv+codes
- https://cdn.shopify.com/s/files/1/0431/7950/7870/files/77551250658.pdf
- https://cdn.shopify.com/s/files/1/0430/7327/4018/files/61326394620.pdf
- https://cdn.shopify.com/s/files/1/0433/3859/6511/files/kukov.pdf
- https://static.usrfiles.com/ugd/b8c837_50199653541b47a692d79a1b27ef0e76.pdf
- https://static.usrfiles.com/ugd/b8c837_8f18b93e00c5441d98dc47483d6ac28a.pdf
- https://static.usrfiles.com/ugd/b8c837_72f3e7aed4a646a0a6eb583b5daed43c.pdf
- https://static.usrfiles.com/ugd/b8c837_6fbb7c673101445893d7852fea85c092.pdf
- https://static.usrfiles.com/ugd/b8c837_cbd8ab50c4df4581ad58a26c6cab1222.pdf
- https://static.usrfiles.com/ugd/b8c837_cfc12aed518b47ab9eba0c7f889ab643.pdf
- https://static.usrfiles.com/ugd/b8c837_ecc3a0f0f1b84a7a89b386ec73cec566.pdf
- https://static.usrfiles.com/ugd/b8c837_184f284dc41c41738d9cb2833859b8bf.pdf
- https://static.usrfiles.com/ugd/b8c837_3ee8675375dc43979a5a34d93c91d2d8.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_off000047b6.bin` `6e677fc64668201be60561a5e2e8db870654cd173443a88262198d182ed8a067`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x47B6	5772 bytes
`font_01_sfnt_off00005b69.bin` `80b7cea7f1d164537fc3f352a74f60cecb2d7449472888021a8754694c729ba5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B69	10312 bytes

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