PDF malware analysis — malicious · 72ec84f039977dbd

MALICIOUS

PDF

35.8 KB Created: 2020-08-29 15:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9aa288b37ce733567e9250d13dfa768f SHA-1: 2af757240d260c8c44d769e462e261fb8480a1c4 SHA-256: 72ec84f039977dbd0c61ab5bfc257be5bee4df5d4d2c594dc0a61afad88d7a50

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link farm designed to appear as legitimate content, but it directs users to a known malicious redirector. The primary malicious URL identified is https://ttraff.cc/wix?keyword=chandrashekara+ashtakam+mp3+free+download, which is likely used to distribute malware or phish for credentials. The ML classifier strongly indicated maliciousness, and the PDF structure itself is suspicious due to the mass of external links.

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.cc/wix?keyword=chandrashekara+ashtakam+mp3+free+download
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0434/5331/7272/files/gaxebiw.pdf
- https://cdn.shopify.com/s/files/1/0430/4686/3005/files/5431218286.pdf
- https://cdn.shopify.com/s/files/1/0431/4615/0039/files/ben_carson_film.pdf
- https://static.usrfiles.com/ugd/b8c837_e715faea046f4d9eb43389ae93912a61.pdf
- https://static.usrfiles.com/ugd/b8c837_15e476fb881f4d30ba11ea5f63b6d2c8.pdf
- https://static.usrfiles.com/ugd/b8c837_337eaea437404630ab88b982952dc62e.pdf
- https://cdn.shopify.com/s/files/1/0438/0921/0529/files/homemade_shooting_bench.pdf
- https://cdn.shopify.com/s/files/1/0432/7663/2217/files/23477936239.pdf
- https://cdn.shopify.com/s/files/1/0433/6661/3141/files/dajewotirusetewuwe.pdf
- https://cdn.shopify.com/s/files/1/0432/9983/1968/files/newipemebowib.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_off00004bc8.bin` `490de9f45d767a130fd0fd46283bc789b905f9871888183d966bdff8de8a2cde`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4BC8	5504 bytes
`font_01_sfnt_off00005e6a.bin` `8ef7551d625fdbf620c6cb64b9b1e94b791e618d52e0b7e9c2ae86a7c15d4ccb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E6A	10672 bytes

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