PDF malware analysis — malicious · 3fccd55dbe65942d

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 15:31:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: fd770c5c2f0a9fa5687d3d6abd9bd97e SHA-1: 71f881cc9c6cac0ffd111157947e870f919157d5 SHA-256: 3fccd55dbe65942deefae2aa1f7b9631f29a4e00b872e816ef0a203d935048ff

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 the primary heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/wix?keyword=cognitive+psychology+and+its+implica'. This indicates the document's purpose is to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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=cognitive+psychology+and+its+implica
- https://static.usrfiles.com/ugd/b8c837_dca6ca4fdd294ad1afac36aad4b7c27e.pdf
- https://static.usrfiles.com/ugd/b444d4_ce031331f6e94ebb8dda8bf081ccabc9.pdf
- https://static.usrfiles.com/ugd/b5aed9_98a1b57e5e464e588d6e161834115545.pdf
- https://static.usrfiles.com/ugd/b8c837_7561fce18c124605ba7d43927f70ad2c.pdf
- https://static.usrfiles.com/ugd/b8c837_0f4d587ac53d4842a8a9de53f98e2172.pdf
- https://static.usrfiles.com/ugd/b8c837_27b7198306ba4d5b884ecc6602194a77.pdf
- https://cdn.shopify.com/s/files/1/0433/2853/6734/files/38861373585.pdf
- https://cdn.shopify.com/s/files/1/0432/0188/8416/files/20156401300.pdf
- https://static.usrfiles.com/ugd/36f25b_2644f67ab96e4bb1b0cc61708b7a71dd.pdf
- https://static.usrfiles.com/ugd/b8c837_2543ab1ed7d14a999ebfdb3c54418f23.pdf
- https://static.usrfiles.com/ugd/4b7290_d2791b7562d24509869f068c03d26945.pdf
- https://static.usrfiles.com/ugd/77d535_8bad8486861242b190bbb28085be6e4a.pdf
- https://static.usrfiles.com/ugd/b8c837_9c89470390f64abf9e233ce32c306a4c.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_off00005e42.bin` `d9aa464122c8042fed73a659f3ebd187463acea81446d4745deab694d0b27e0a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E42	5460 bytes
`font_01_sfnt_off000070c2.bin` `8b6d922f77e1ce83773a9571f79845ac8bc7dbf2cbfd17098ad3217f7456e5f7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x70C2	9928 bytes

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