PDF malware analysis — malicious · a6827bd2d6d38641

MALICIOUS

PDF

35.7 KB Created: 2020-09-03 09:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2d9f0411405cf4250abca56d7ee0c560 SHA-1: c3fb655252ae6bf74f332dd542a770374e926e25 SHA-256: a6827bd2d6d3864104a0a0de89257932e5cc439c91cda551200a4ddd45378063

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links, one of which, https://ttraff.me/wix?keyword=scansnap+ix500+setup+guide, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Scansnap ix500 setup guide' and 'wkhtmltopdf', suggesting a lure to disguise the malicious link. The presence of numerous other PDF links, many pointing to static.usrfiles.com, indicates a link farm strategy, likely to obscure the ultimate malicious destination or for SEO poisoning.

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=scansnap+ix500+setup+guide
- https://static.usrfiles.com/ugd/0d2908_1b237f36d4a04ba1868b66fd2761722a.pdf
- https://static.usrfiles.com/ugd/b8c837_1398ee65aaa34f92b29ee2abb46b524d.pdf
- https://static.usrfiles.com/ugd/2ca09c_1ad0388128bb46768175ea234cce0582.pdf
- https://static.usrfiles.com/ugd/b8c837_72114670a1974d5293f12dccec51f90e.pdf
- https://static.usrfiles.com/ugd/e4ff69_87dd462af3024db5a255b7633060d58f.pdf
- https://static.usrfiles.com/ugd/73cb9e_423bf2816e154fe5900c22de90b23dca.pdf
- https://cdn.shopify.com/s/files/1/0434/0056/0803/files/champions_league_schedule_2019_20.pdf
- https://cdn.shopify.com/s/files/1/0429/3492/7513/files/avernus_5e.pdf
- https://static.usrfiles.com/ugd/1fa6dd_d38d18996c8c42038898978677b724de.pdf
- https://static.usrfiles.com/ugd/a382ee_d284b635c80841148191906018fc3427.pdf
- https://static.usrfiles.com/ugd/b8c837_d7be3290c59e42d39fbaece658f1d0a6.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_off00004e2d.bin` `b7b934b08967ea34d564266f67270e10fb3040f737f4d7b24f7f20aab4921de7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4E2D	5548 bytes
`font_01_sfnt_off00006130.bin` `c318e888a0b114d32819d89977f3f2cb180afc268194284569f4fd1ad5fa307e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6130	9796 bytes

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