PDF malware analysis — malicious · 67fbc70633540bd6

MALICIOUS

PDF

40.0 KB Created: 2020-09-03 00:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 11a52410891a2cab247614d93af0c4f4 SHA-1: d5e7cf505043c5a7cccc163acd1464053b1b3672 SHA-256: 67fbc70633540bd6bcd95e28dd0fcd9974ba506f7018cc5f1873ef79b8b47e28

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.com/wix?keyword=bhakti+gana+bhojpuri+video, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a link farm or SEO spamming tactic to distribute malicious content. The ML classifier also strongly indicated maliciousness.

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=bhakti+gana+bhojpuri+video
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/87b9a8_423599f7601a4fe5a2373116f68c78b0.pdf
- https://static.usrfiles.com/ugd/b48b60_f3d3b6ae36a34c34b474c579861cc46d.pdf
- https://static.usrfiles.com/ugd/64d889_58c493c6dbcf471e862cc894849ebd16.pdf
- https://static.usrfiles.com/ugd/61f964_bf0633dd96e548c8a224851f42fe54cd.pdf
- https://cdn.shopify.com/s/files/1/0434/1540/4702/files/symmetry_surgical_catalog.pdf
- https://static.usrfiles.com/ugd/764aaa_6467f8c6aa894afb801b6eaae56eff88.pdf
- https://static.usrfiles.com/ugd/811c4f_4797109876cc421196f5e074a53c3908.pdf
- https://static.usrfiles.com/ugd/d54300_3d3dc2da939f4472b0604709107e1e7f.pdf
- https://cdn.shopify.com/s/files/1/0430/7818/9205/files/lobedude.pdf
- https://cdn.shopify.com/s/files/1/0434/7228/9944/files/92077592994.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_off00005366.bin` `3512860cbbd7283ed71a2eb1e0a568df4cfbfdd7aeea9b3dd7a3919a660466e4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5366	5400 bytes
`font_01_sfnt_off000065c9.bin` `567372431015d2ba350addc42e5a1c212e238b090e2e720eb563fdde32090a63`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65C9	14324 bytes

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