PDF malware analysis — malicious · 5ac34dd7cb9a07dd

MALICIOUS

PDF

43.4 KB Created: 2020-08-29 21:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d2e95567a8b126e43b319c961c421772 SHA-1: 7c8d156ab54ada7cfd14e54a5badd5c78b6eb3ef SHA-256: 5ac34dd7cb9a07dd44f85af50fd0ec268e2e07438ed454f45cf980ce31c9913a

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and other PDF links, suggesting a lure to external content. No scripts were extracted, but the presence of embedded links points to a phishing or SEO spam attack pattern.

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=dragon+age+origins+leliana+quest
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_9a2c7ab771be4782bb82ef33e6564db6.pdf
- https://static.usrfiles.com/ugd/b8c837_8056aaab75594634a7a7887e2d8ef7f8.pdf
- https://static.usrfiles.com/ugd/238140_938252fa044f40c2a8eaff2be1b90b89.pdf
- https://static.usrfiles.com/ugd/162fe6_5ca530b3936b4b8785c79a369c6a6990.pdf
- https://static.usrfiles.com/ugd/63d3ad_f92aceec03c2494e9286935142f1ad27.pdf
- https://cdn.shopify.com/s/files/1/0462/8584/8737/files/sijidaxuzuzulinulipu.pdf
- https://cdn.shopify.com/s/files/1/0438/0177/2192/files/opera_mini_browser_for_windows_xp.pdf
- https://cdn.shopify.com/s/files/1/0429/7608/4117/files/baixar_capitaes_de_areia_em_gratis.pdf
- https://cdn.shopify.com/s/files/1/0432/9802/9733/files/80746677066.pdf
- https://cdn.shopify.com/s/files/1/0437/4223/2725/files/xiwut.pdf
- https://cdn.shopify.com/s/files/1/0431/2471/9773/files/blanchard_macroeconomia_italiano.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006b2e.bin` `c0c8b96ec0a150e4429981a662735ae7a77e4d30b763c17b50ef95f12a41fb32`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6B2E	4980 bytes
`font_01_sfnt_off00007c28.bin` `6e9f4c3509ec7b5bd3086ef7e0b87e31ce1847a80357c38f7783d71d03e1cd77`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C28	10736 bytes

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