PDF malware analysis — malicious · cc7a48c2e1e68b03

MALICIOUS

PDF

37.6 KB Created: 2020-08-30 14:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e1ff30861d5d7d8a0ce26d85762f97b6 SHA-1: 94a15d2a24b5f801183ac9ac01e1d59c467f723a SHA-256: cc7a48c2e1e68b03a5ff31d2399fdcd21af6f8cb8f637ddc875de5a79a2bdf83

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with a prominent malicious redirector URL. The document body, though heavily obfuscated, contains the string 'Asain school Girl sex' and the malicious URL, suggesting a lure for adult content or similar. The ML classifier strongly indicates maliciousness. No scripts were extracted from this sample.

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=Asain+school+Girl+sex
- https://cdn.shopify.com/s/files/1/0430/6042/8962/files/63720651942.pdf
- https://cdn.shopify.com/s/files/1/0440/7925/1608/files/58286769727.pdf
- https://cdn.shopify.com/s/files/1/0440/3304/8741/files/ak_interactive_xtreme_metal.pdf
- https://cdn.shopify.com/s/files/1/0437/3128/8216/files/97018220302.pdf
- https://cdn.shopify.com/s/files/1/0429/1664/2975/files/peliniputevubamodap.pdf
- https://cdn.shopify.com/s/files/1/0437/9928/1821/files/dikujefa.pdf
- https://static.usrfiles.com/ugd/b8c837_f46f58385619404488cd035471c1ba86.pdf
- https://static.usrfiles.com/ugd/b8c837_0eb0e77a0ce34d7fbf99dfe246adae0b.pdf
- https://static.usrfiles.com/ugd/b8c837_93fe84e100b6477d969d195a3613f412.pdf
- https://static.usrfiles.com/ugd/837d34_e11f1f3bba1846a9b29da1498a0ccef2.pdf
- https://static.usrfiles.com/ugd/221f3a_0b2ddd04251144969dc5692fa78a7966.pdf
- https://static.usrfiles.com/ugd/3aee12_c0a57e6d74b4496f8e55bfdb9fc0f207.pdf
- https://static.usrfiles.com/ugd/b8c837_af64b28627cd4bec8224d9ecbae77549.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_off00004d97.bin` `9c7195246e07e348f2dccc014827bdcc1ac3cf0c2d5ab802a9bbdc9e0638835e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4D97	5072 bytes
`font_01_sfnt_off00005ecb.bin` `144ad264423d0daac459a941bd321698208b89d25d0c9a1a3ab7c6ff9d40d0c2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5ECB	13784 bytes

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