PDF malware analysis — malicious · 0ec525e2e35d0695

MALICIOUS

PDF

41.2 KB Created: 2020-08-31 00:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5f3b53a9412e4da43f02488848c6d4a6 SHA-1: bd0281218df3b32af3265a249bf8e98df517fa87 SHA-256: 0ec525e2e35d06951f719b65a7d8ccc980fde720f43acc557f84efe88d4a9c89

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for users interested in product development. The ML classifier strongly flagged this PDF as malicious, suggesting a high likelihood of malicious intent.

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=principles+of+product+development+fl
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/ea9bdf_6edc5774512f4a7f96e6ea0f9502b91f.pdf
- https://static.usrfiles.com/ugd/b8c837_4888ca9a04c847228ff20eebe8ea2965.pdf
- https://static.usrfiles.com/ugd/b8c837_a4c5e787f2bd47cd926fb14535470c8c.pdf
- https://static.usrfiles.com/ugd/b972d5_c264fba2d9754872bab91abd436dd920.pdf
- https://static.usrfiles.com/ugd/0aab01_8e45b215dea64acd990e5053c5a72fa7.pdf
- https://static.usrfiles.com/ugd/b8c837_e1ecea4fb2ef4005905eea90850c4860.pdf
- https://static.usrfiles.com/ugd/b8c837_8f4a2c07e0b840fabca3136754149fbb.pdf
- https://static.usrfiles.com/ugd/286fb8_80e0943a70cc4ee8b6d901aef38d0c05.pdf
- https://static.usrfiles.com/ugd/ec0c41_392339bbb4c548b68dfbcd6e31f84f08.pdf
- https://static.usrfiles.com/ugd/225520_67f466a465534e5aab338c6cce09213f.pdf
- https://static.usrfiles.com/ugd/e3834b_0240779657274a7f843ae787e96fb22d.pdf
- https://static.usrfiles.com/ugd/97aff7_9299750ce8a74876807fa4c4a60de25d.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_off00006474.bin` `82fbd067a0083feaa889603ad0935d5511d878b5e83e81548bb10da651c4477e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6474	5152 bytes
`font_01_sfnt_off000075e2.bin` `5acd08ebd5cb1d463a53dc87f845aa948bcf76287a52452e7a1f61473c94b927`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x75E2	10120 bytes

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