PDF malware analysis — malicious · 3e79965f1a30c17e

MALICIOUS

PDF

35.3 KB Created: 2020-08-01 11:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: eb02f86155011e1817f09a9f798cbc57 SHA-1: b6c9f765c2fa30ebf30a10a5dead2a269ead4cf1 SHA-256: 3e79965f1a30c17edd2d4574ba9b38a6edbfcc88a44dd7c57694283c33e52fcb

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to send users to further malicious content. The document body, though heavily obfuscated, contains this URL and other links to PDF files hosted on Shopify, suggesting a link farm or redirection strategy. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=osrs+dragon+boots
- http://files.vaughnara.com/uploads/1/3/0/8/130814402/9350035.pdf
- http://files.yoganurse.net/uploads/1/3/0/7/130776745/nubumulisopida.pdf
- http://files.janets-table.com/uploads/1/3/1/1/131164425/xumuvolufapuzi.pdf
- https://cdn.shopify.com/s/files/1/0434/3519/6568/files/88077086848.pdf
- https://cdn.shopify.com/s/files/1/0432/0896/6307/files/mimagagoxazasesupa.pdf
- https://cdn.shopify.com/s/files/1/0434/7117/5832/files/527027897.pdf
- https://cdn.shopify.com/s/files/1/0429/3197/8403/files/sanafasef.pdf
- https://cdn.shopify.com/s/files/1/0437/5281/6798/files/lovow.pdf
- https://cdn.shopify.com/s/files/1/0429/0658/3203/files/84667186344.pdf
- https://cdn.shopify.com/s/files/1/0431/8298/1278/files/sonusibut.pdf
- https://cdn.shopify.com/s/files/1/0436/9298/2427/files/farapoxupulumekemojegawi.pdf
- https://cdn.shopify.com/s/files/1/0429/5337/5897/files/29032713102.pdf
- https://cdn.shopify.com/s/files/1/0428/9432/7975/files/zikabiligaxuka.pdf
- https://cdn.shopify.com/s/files/1/0433/6310/6968/files/42704223080.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_off00004bb9.bin` `c6fead52a57b809cf5c2f8111c9fd06d84938c8738d564701e5392ba5bcde092`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4BB9	5128 bytes
`font_01_sfnt_off00005d2d.bin` `fe0039d8a2ac8aaca5d9964fdb063ec8a38f81cb07338163bc4512e2a6e23f1d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D2D	10528 bytes

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