PDF malware analysis — malicious · 704c2c8993476fde

MALICIOUS

PDF

144.0 KB Created: 2020-10-31 16:30:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e7f5e7a78acea636cab311c0d6f6d3ae SHA-1: d6cfbc14b82e9226978fffdc6c7d06cacbcd086c SHA-256: 704c2c8993476fdeff9935de225a660e2f99a77ce170c2cff91f5f2f9798246c

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and a keyword suggesting a lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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/123?keyword=kamen+rider+zangetsu+shin
- https://cdn-cms.f-static.net/uploads/4365624/normal_5f86f9f779e23.pdf
- https://cdn-cms.f-static.net/uploads/4446390/normal_5f9d72367a5ff.pdf
- https://cdn-cms.f-static.net/uploads/4391315/normal_5f90ec19e371f.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0436/3727/6825/files/44293817047.pdf
- https://s3.amazonaws.com/dazinibonofobi/ancient_egyptian_hieroglyphics_dictionary.pdf
- https://s3.amazonaws.com/xozeb/92488108859.pdf
- https://s3.amazonaws.com/jozetej/assam_tet_2019_advertisement.pdf
- https://s3.amazonaws.com/tapexiw/ruseju.pdf
- https://s3.amazonaws.com/zalomi/salon_business_plan_south_africa.pdf
- https://uploads.strikinglycdn.com/files/fff526b9-bda0-4669-8c1d-d238e08c58eb/35859215601.pdf
- https://uploads.strikinglycdn.com/files/8cecf003-d490-474a-9913-4278600513aa/manual_for_brother_sewing_machine_jx2517.pdf
- https://s3.amazonaws.com/dowavelaxam/sorcerer_saving_throws.pdf
- https://cdn.shopify.com/s/files/1/0505/2655/2264/files/zajune.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_off0001fb8c.bin` `be96888b59ce27ba608020c314d78bbf5da18d1ec34b24aa268beef0f3dab53e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1FB8C	5228 bytes
`font_01_sfnt_off00020d36.bin` `500d351d2ed5e6b945e6c88a4599a6b9e5a83f55e2920f681152cc0091543112`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x20D36	10992 bytes

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