PDF malware analysis — malicious · 66eb71a0e1e5d31e

MALICIOUS

PDF

32.9 KB Created: 2020-09-03 11:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cce4a319ff00810f8c4a70b838c212c2 SHA-1: ec0de54034c9d4a8320c17c6dca6c9afcd69b3a7 SHA-256: 66eb71a0e1e5d31ebad580b5630e9f8fded84c81fad0bd83ec1629d7df4316bc

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector found by the heuristic. The presence of multiple external links suggests an attempt to direct users to potentially malicious content, likely for phishing or malware distribution.

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.link/wix?keyword=chutki+bajana+chod+de+song++video
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/07e02c_7e6e455f4ee04712b37f96a25dd1127d.pdf
- https://static.usrfiles.com/ugd/3be3a7_e9770c8d90d34b8daaf4d32de56e438f.pdf
- https://static.usrfiles.com/ugd/72b0e7_0c477e928294484093a4c6b85f33834b.pdf
- https://cdn.shopify.com/s/files/1/0434/6835/7796/files/wiley_cpa.pdf
- https://static.usrfiles.com/ugd/6f7357_1e78860fb39b4e28a018d058884dcc3e.pdf
- https://static.usrfiles.com/ugd/b8c837_6e09bd7a86944a7c8b3a8e7710a3ed70.pdf
- https://static.usrfiles.com/ugd/a107db_6d5b647a94024232b394b80845ef7949.pdf
- https://cdn.shopify.com/s/files/1/0437/6467/8807/files/50987425297.pdf
- https://cdn.shopify.com/s/files/1/0452/4756/1890/files/57364013963.pdf
- https://cdn.shopify.com/s/files/1/0433/9384/3358/files/bavadalanojavenewul.pdf
- https://cdn.shopify.com/s/files/1/0432/1378/3199/files/java_bank_app_scanner.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_off00004380.bin` `b3599f96fbf6e7bbf9ec90a4166910b4dfc1f326358c9325b8afbc7459e4bc44`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4380	5316 bytes
`font_01_sfnt_off00005595.bin` `bc44c2176cf123b0c0012bd92669db23a2958929687b727519b4f08bd43fd96a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5595	9904 bytes

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