PDF malware analysis — malicious · 06caba3895b9003f

MALICIOUS

PDF

42.2 KB Created: 2020-09-03 13:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ca814041df84b936499c26f65846b43f SHA-1: 55319432f41461e6b628060cac62983250906cbd SHA-256: 06caba3895b9003f19994fe9d628d8e845d41cad0703f5f031678d7f6da2cb2c

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a 'medical disclaimer form template' lure. The presence of a link farm and a malicious redirector indicates an attempt to lead the user to malicious content, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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.club/pify?keyword=medical+disclaimer+form+template
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0429/4751/0435/files/99668652396.pdf
- https://cdn.shopify.com/s/files/1/0434/1048/9496/files/soul_to_keep_music_video.pdf
- https://cdn.shopify.com/s/files/1/0436/7125/7241/files/sulixu.pdf
- https://cdn.shopify.com/s/files/1/0434/4751/7349/files/26661778301.pdf
- https://static.usrfiles.com/ugd/b8c837_d25bd7c384f64513b634e0770dba64ed.pdf
- https://static.usrfiles.com/ugd/a86d68_c0515dc1b7a347338ef213c8e423c99b.pdf
- https://static.usrfiles.com/ugd/5d2cf3_38c5c748de3f414e9ba241c050e3e91f.pdf
- https://static.usrfiles.com/ugd/762c1a_ad64984177ae463eb23b40350bc282a9.pdf
- https://static.usrfiles.com/ugd/c75f60_7c0bec5ea571492aa0466a184e2fbc19.pdf
- https://static.usrfiles.com/ugd/6cf392_11508e9604534015a5cb30f2f9dd99d7.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_off00006760.bin` `73bb0fddec9c828e8dc445a8607bf089abbf606e53852ab9795b57b1ef17f720`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6760	5304 bytes
`font_01_sfnt_off0000795f.bin` `661cb38c8882b1f96b5c9248a4949b06b638809bbe501c5cf4dd71d93c94559b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x795F	10308 bytes

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