PDF malware analysis — malicious · ec35994f4058e371

MALICIOUS

PDF

42.6 KB Created: 2020-08-30 02:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d06909b0f787cdedf366cf47cbbc167b SHA-1: dee77df0e0e1b616da62caec1a7927da0bb81250 SHA-256: ec35994f4058e371a981fe3ae7996d4bf240b55314eeb5be22e4752764a28f27

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or to download further malware.

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=tres+metros+sobre+el+cielo+libro%2529
- https://static.usrfiles.com/ugd/2f8cea_2b5c74700902434c846ff57ee2ee478d.pdf
- https://static.usrfiles.com/ugd/b8c837_7339051676e34dbe9b5a7647ef9d821e.pdf
- https://static.usrfiles.com/ugd/6cf0f5_ce6985d5259c472f95aaaee63e08619c.pdf
- https://static.usrfiles.com/ugd/3aee12_8fbe1adce12a4389ad8b26b0d690baaf.pdf
- https://static.usrfiles.com/ugd/ace02d_10545f3e4e644614b2a889675b2bcc1a.pdf
- https://static.usrfiles.com/ugd/0049ca_cda32a900b514c5ead5f303cda1e43df.pdf
- https://static.usrfiles.com/ugd/b8c837_a182443aa60d49d9aceba2fbf9fcfffd.pdf
- https://static.usrfiles.com/ugd/3f0e57_bf9d13120d89418dae0e3cefcaa4679b.pdf
- https://static.usrfiles.com/ugd/d99ef3_df6f6518950c4e6c975b4500d60978ff.pdf
- https://cdn.shopify.com/s/files/1/0435/4179/0871/files/gemubisivilanux.pdf
- https://cdn.shopify.com/s/files/1/0432/4763/2548/files/relative_dating_in_archaeology.pdf
- https://cdn.shopify.com/s/files/1/0438/4446/8901/files/28027605708.pdf
- https://cdn.shopify.com/s/files/1/0429/6045/3791/files/kukefesotunumebedejinuzi.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_off0000686e.bin` `2058606b100c5e4185866f5dbc2fa865d770d71e8d31ddc502e7dc8a79c62e25`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x686E	4900 bytes
`font_01_sfnt_off0000790f.bin` `0a7d72cba6202de62589c872c2dc1ab910583d0f25bdf35ec72b1bbc81721a83`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x790F	11344 bytes

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