PDF malware analysis — malicious · e70a942f0d6b3026

MALICIOUS

PDF

40.0 KB Created: 2020-09-24 05:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ed2f85981b87c3031c1a7a4e14636133 SHA-1: 835910c612c51b9937720b78f22a4918e180177f SHA-256: e70a942f0d6b3026ab4c84eea51a26c48c051f0de88843f5c6859f536b5224a5

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to shopify.com domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Evolution by natural selection worksheet mice' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link indicates a likely phishing or malware distribution attempt.

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=evolution+by+natural+selection+worksheet+mice
- https://cdn.shopify.com/s/files/1/0437/0799/0169/files/70783659018.pdf
- https://cdn.shopify.com/s/files/1/0429/8260/4963/files/modesabox.pdf
- https://cdn.shopify.com/s/files/1/0431/7279/0427/files/psp_emulator_games_for_mobile.pdf
- https://cdn.shopify.com/s/files/1/0428/9023/1974/files/platelet_count_in_pregnancy.pdf
- https://cdn.shopify.com/s/files/1/0432/3747/4466/files/bsc_1_year_chemistry_book.pdf
- https://cdn.shopify.com/s/files/1/0434/0560/7079/files/firusuvojuko.pdf
- https://cdn.shopify.com/s/files/1/0434/7727/0678/files/makeup_artist_resume.pdf
- https://cdn.shopify.com/s/files/1/0436/1791/0944/files/62447559106.pdf
- https://cdn.shopify.com/s/files/1/0428/4874/7676/files/general_ability_test_book_for_nda.pdf
- https://cdn.shopify.com/s/files/1/0431/0417/4233/files/17565125376.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005e48.bin` `893598ea0bd8a9be0f2d53423b70696bc679d02f3ea75ea1d5cd43cc2e5b693a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E48	5456 bytes
`font_01_sfnt_off000070c6.bin` `bd41df5d08bc1cb5c4f4c21a25ad0f83df41b54dbbae80014fc5c34795762f46`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x70C6	10132 bytes

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