PDF malware analysis — malicious · 9179f8ede5e8a7e0

MALICIOUS

PDF

35.8 KB Created: 2020-09-03 15:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e71b4d993d20f342699a37772698f467 SHA-1: 2e88fe1885885d8973eb4acde2bbe0ef5d880e01 SHA-256: 9179f8ede5e8a7e00df9019128b7a50b18a7c1d82a7d4f29444dba85a4482635

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which points to a URL designed to lure users with a product search query. The document body, though heavily obfuscated, contains the same URL and references to Egyptian cotton sheets, suggesting a phishing or scam attempt. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to potentially distribute further malicious content or improve SEO for malicious sites.

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=best+egyptian+cotton+sheets+king
- https://cdn.shopify.com/s/files/1/0431/1931/3062/files/46475257566.pdf
- https://cdn.shopify.com/s/files/1/0430/8402/1921/files/kepesixujini.pdf
- https://cdn.shopify.com/s/files/1/0432/5238/3907/files/free_water_cycle_worksheet.pdf
- https://cdn.shopify.com/s/files/1/0431/8006/4936/files/55142770126.pdf
- https://static.usrfiles.com/ugd/ce5d00_89a1671eaaeb438d8d71856e6faf3734.pdf
- https://static.usrfiles.com/ugd/b8c837_2d77b55810b44e66b0a011550b59a5db.pdf
- https://static.usrfiles.com/ugd/d2751c_d396e2acf85746579ba0a4996efe0e4a.pdf
- https://static.usrfiles.com/ugd/67e251_9135177d5a5640f4a5538ae774b4c9bd.pdf
- https://static.usrfiles.com/ugd/f0e51d_f08fb432b1ab4a8490b59aea473a0af4.pdf
- https://cdn.shopify.com/s/files/1/0435/4100/4439/files/bamefojoxunuged.pdf
- https://cdn.shopify.com/s/files/1/0430/0124/9955/files/panizifemekavitov.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_off00005108.bin` `83d8e58549c8bb7238c72e60b8829dfe22636095d40140ac3ca0581ec2ff83b8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5108	5284 bytes
`font_01_sfnt_off00006312.bin` `81394c3238e9c185e2a6cfd835cd2290aafec123fc77c43b6cb1cd0dca480a7d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6312	9268 bytes

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