PDF malware analysis — malicious · 7a37dc058d1f25ac

MALICIOUS

PDF

40.9 KB Created: 2020-08-14 23:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 798a111d3294057168b7c707bce9851b SHA-1: 880dc05d50e7d8f1fb6927e2a2b1d2565dc6c5a7 SHA-256: 7a37dc058d1f25ac565ebd3530949a9ca98b052b33899f413609fee2245f8d2e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious content, specifically targeting search terms like 'android sdk install ubuntu 16.04'. The primary malicious URL identified is ttraff.ru, which is flagged as a redirector. The document body itself contains obfuscated text and embedded URLs, reinforcing the malicious intent.

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/pify?keyword=android+sdk+install+ubuntu+16.+04
- http://files.lightningridgerealestate.com.au/uploads/1/3/2/8/132815961/tuwor.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.pdf
- https://cdn.shopify.com/s/files/1/0452/6866/4481/files/roxodutazepus.pdf
- https://cdn.shopify.com/s/files/1/0437/0087/9515/files/pepubeboto.pdf
- https://cdn.shopify.com/s/files/1/0435/7976/8995/files/kudvenkat_sql_interview_questions_and_answers.pdf
- https://cdn.shopify.com/s/files/1/0433/5131/0488/files/vugusekomajanu.pdf
- https://cdn.shopify.com/s/files/1/0434/2808/5912/files/kifuropoduwib.pdf
- https://cdn.shopify.com/s/files/1/0435/1141/4939/files/jewarasire.pdf
- https://cdn.shopify.com/s/files/1/0435/5283/3695/files/dovemibel.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005429.bin` `dc7a89b9dc8f864ad3ff931ebd132b0fb448f08bd759a1091da52b11bede281e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5429	5244 bytes
`font_01_sfnt_off00006609.bin` `d59526028d7a01dc89dd22add166000bffc018b938dc5d863c7f2573d197af3f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6609	10244 bytes
`font_02_sfnt_off00008918.bin` `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8918	4324 bytes

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