PDF malware analysis — malicious · c1efed38ff6ff2cd

MALICIOUS

PDF

38.9 KB Created: 2020-08-31 07:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d40f8b799fce7acc92c7ee5172fedbf3 SHA-1: 301d60ab73a4e464d25f3499ef77a47179f9c232 SHA-256: c1efed38ff6ff2cd3d8a460894bcbd3beb8c5059c364d854701fd34b4cb21271

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic indicates these links point to a known malicious redirector infrastructure, specifically `https://ttraff.cc/wix`. Another heuristic flagged it as a PDF link farm, with many links pointing to `cdn.shopify.com` domains. The document body contains garbled text but includes the suspicious URL and several other Shopify URLs, suggesting a potential lure or redirection mechanism.

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=som%25C3%25A1r+druhy+plemien
- https://cdn.shopify.com/s/files/1/0437/6661/2130/files/accipiter_striatus.pdf
- https://cdn.shopify.com/s/files/1/0430/1137/5267/files/38387838960.pdf
- https://cdn.shopify.com/s/files/1/0437/1932/7896/files/rizixerefexaribi.pdf
- https://static.usrfiles.com/ugd/b8c837_765281d8729b4e3083c224be80ecbd8c.pdf
- https://static.usrfiles.com/ugd/b8c837_c720883fa70a4b16aa28daeb13e60fa9.pdf
- https://static.usrfiles.com/ugd/bdeb4c_9b32dcc7e3cc49c6aca21a8e7b6a4f2b.pdf
- https://static.usrfiles.com/ugd/99afdc_5ea208fbf69c4433b8e4b24c33976857.pdf
- https://static.usrfiles.com/ugd/d2751c_bc4843006a4344928333709729073a9f.pdf
- https://cdn.shopify.com/s/files/1/0440/5123/4981/files/26419168452.pdf
- https://cdn.shopify.com/s/files/1/0433/6808/7701/files/autodwg_to_dwg_converter_2020.pdf
- https://cdn.shopify.com/s/files/1/0429/4901/7756/files/37728462891.pdf
- https://cdn.shopify.com/s/files/1/0434/4119/3110/files/25631794975.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_off000055ad.bin` `2279309606b4e7e6f8208bd33b7020bef0f79dbbf60cdd3a8333f9948e0be3d9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x55AD	5252 bytes
`font_01_sfnt_off00006765.bin` `ad397c400ac908113bad9878b25b14d5f52f10155816e11d3c05b9e549b20ee9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6765	12768 bytes

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