PDF malware analysis — malicious · 06d583d6d4326680

MALICIOUS

PDF

39.3 KB Created: 2020-08-30 19:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: de0652c33e1bcd0cb536d56693bef2b9 SHA-1: ee1fa4ce55804adb33e8f76ba681d4c15f183ed0 SHA-256: 06d583d6d43266807044e16e8e768f932d794d6ab8ac6236674711df8146a9ea

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF contains a large number of embedded links, many of which point to external PDF files, forming a link farm. One of the primary links, https://ttraff.ru/wix?keyword=theatre+merit+badge, is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The document body, though partially obfuscated, contains the malicious URL, suggesting a lure to external content.

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.ru/wix?keyword=theatre+merit+badge
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/0d2908_b0233e0b702e45a2b0f1ddfa63a7e8b2.pdf
- https://static.usrfiles.com/ugd/b8c837_7fa031943cc14e4887eb4feb4f9d60d0.pdf
- https://static.usrfiles.com/ugd/43d598_7edc041d304b409585bd3b7acca214b6.pdf
- https://cdn.shopify.com/s/files/1/0434/5105/6284/files/anions_and_cations_list.pdf
- https://static.usrfiles.com/ugd/b8c837_6674ef1399d8477a92440467295144bd.pdf
- https://static.usrfiles.com/ugd/edb4a7_fa8f88ebac5748ee8dcc312dcb4e0d04.pdf
- https://static.usrfiles.com/ugd/36f25b_a42a9ce49f3f4695b57af41abadf7c43.pdf
- https://static.usrfiles.com/ugd/accd1f_6c7f04b6f5d148cfac2508fbed515eec.pdf
- https://static.usrfiles.com/ugd/43d598_75119caeb8c94cee8658e4e2b64cd286.pdf
- https://static.usrfiles.com/ugd/74e905_afa50ec200fd4b58bfebc9238b24aec0.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_off00005e31.bin` `792aa33e77a0046cd948e902f9048bd583b286bd281fb53fbde052efa82e5a9d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E31	5116 bytes
`font_01_sfnt_off00006f6d.bin` `298241a0dd6b0ce0553442d81d43ed58326fa7dbd32362bc7e2aa19903f6dcf6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F6D	9876 bytes

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