PDF malware analysis — malicious · 02eadf775ac2d9c1

MALICIOUS

PDF

46.3 KB Created: 2020-09-04 09:38:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d8335bb27df5280aa3e62d47df0ba88f SHA-1: 2b74cc794c9f364c367caac0bc5193139f89a1b3 SHA-256: 02eadf775ac2d9c17d0860bb9fc689a9a68fc9458e02bf0ef5d9d2e9e0ea9b53

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically `ttraff.me`. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. The presence of numerous external PDF links, many pointing to benign content, is characteristic of SEO link farm techniques used to improve search engine ranking for malicious 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.me/wix?keyword=concentration+of+solution+sample+problems+with+answers
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/76156b_203e9d52a5e3432ca89c484f5fae1b5d.pdf
- https://static.usrfiles.com/ugd/2b25b5_980c5495448c4d36baa9c17f9fc5075b.pdf
- https://static.usrfiles.com/ugd/b8c837_97ae035b272045479be49a6e15ce87e1.pdf
- https://cdn.shopify.com/s/files/1/0437/6982/3390/files/84760927930.pdf
- https://cdn.shopify.com/s/files/1/0429/0337/1935/files/cmfas_m6_study_guide.pdf
- https://cdn.shopify.com/s/files/1/0430/5921/6533/files/irrigation_engineering_book_download.pdf
- https://cdn.shopify.com/s/files/1/0456/4464/4519/files/centered_log_ratio_transformation.pdf
- https://static.usrfiles.com/ugd/3826db_382b0159e28943cdaced96bdaff7217e.pdf
- https://static.usrfiles.com/ugd/6e13d9_480f738cab954b12aa5687a888fc4c06.pdf
- https://static.usrfiles.com/ugd/09c3c7_6b81179552ad4dafbf2b5528b6cc2556.pdf
- https://static.usrfiles.com/ugd/57c819_b8b2519c53834c59a90144d9ca566be7.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_off00006d6e.bin` `6de0b0029f95d3468b235157fe404a8f4f8b092f4b23f7d0394147fe78a1f2ca`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D6E	5392 bytes
`font_01_sfnt_off00007fa6.bin` `461d5e54aa0cd89b3ac53209f205f62669da17e908dcb63eccd5138a3505caaa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7FA6	14488 bytes

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