PDF malware analysis — malicious · ce3cf83ce8b0cfa3

MALICIOUS

PDF

38.3 KB Created: 2020-08-31 15:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0852075c43e6f123a1f3ea649660a085 SHA-1: 5c2a86c85c8ab86d9ff4f0bff23fd6d8d16af5b8 SHA-256: ce3cf83ce8b0cfa3ecaa2d54c49f5a6a1ab5864a1f84f991fddb5bf03938ddb4

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document was flagged as malicious due to a critical heuristic indicating it links to known malicious redirector infrastructure. It also contains a mass of external PDF links, likely intended to lead users to malicious sites. The primary malicious URL identified is https://ttraff.ru/wix?keyword=chichora+movie+songs++mr+jatt. 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.ru/wix?keyword=chichora+movie+songs++mr+jatt
- https://cdn.shopify.com/s/files/1/0438/7058/4987/files/58301618054.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdf
- https://cdn.shopify.com/s/files/1/0428/6388/6495/files/gekekaso.pdf
- https://cdn.shopify.com/s/files/1/0431/6073/1799/files/getoxesoguroxowuda.pdf
- https://static.usrfiles.com/ugd/5be868_9639f71a85c04848aa5c137101c17022.pdf
- https://static.usrfiles.com/ugd/b8c837_05541944863e4a8cb301cb6a7e10482f.pdf
- https://static.usrfiles.com/ugd/07625c_4db61924467743a6b0bd98159c7a4afb.pdf
- https://static.usrfiles.com/ugd/aef5b7_4abd30b4b59e454d9f27bff6253186c3.pdf
- https://static.usrfiles.com/ugd/83d902_6d8ee4d63b7945c5b116041d78308619.pdf
- https://cdn.shopify.com/s/files/1/0432/2577/6288/files/metformina_y_alcohol.pdf
- https://cdn.shopify.com/s/files/1/0429/8250/6647/files/sajisoj.pdf
- https://cdn.shopify.com/s/files/1/0428/1407/9143/files/zixadezuma.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_off000042e4.bin` `9af40e16218bdcaeb15b8e49bbb07931c245a463a048f2d9107fc72348e01627`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x42E4	5224 bytes
`font_01_sfnt_off00005483.bin` `94351a9da6234580120f2ce944bff381f076584118efc5216e4388c7c1f49637`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5483	9616 bytes
`font_02_sfnt_off000075c6.bin` `812c20c620f65b0b1d8a4e756ad2d3550dfde89c555fbb839b7470ec6b1f9474`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x75C6	6392 bytes

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