PDF malware analysis — malicious · f245fc8e8f8cf448

MALICIOUS

PDF

40.4 KB Created: 2020-08-01 19:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cfee9f54bbc1e7b5e884ab8f4d87ea54 SHA-1: ad6e3604573d04e078163c43a35aee926559d071 SHA-256: f245fc8e8f8cf4483b14d4c54a153cd402bf08c2f0bf176f84ddb55c82b7d212

160 Risk Score

Malware Insights

MITRE ATT&CK

T1204 User Execution T1566 Phishing T1059 Command and Scripting Interpreter

The PDF contains a link farm and a critical heuristic firing for a malicious redirector, indicating a social engineering attempt. The document body, though heavily obfuscated, contains text suggesting a lure related to a corrupted DLL, and the SE_CLICKFIX heuristic confirms instructions to bypass macro restrictions by tricking users into running commands. The primary IOC is the redirector URL which likely leads to further malicious content.

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.
ClickFix social engineering attack high SE_CLICKFIX

Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
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/pify?keyword=bootres.+dll+corrupt+windows+10
- http://files.synergy-electrical.com/uploads/1/3/1/3/131382092/1191589.pdf
- http://files.brandonarthurshindolcsw.com/uploads/1/3/1/4/131437308/8401160.pdf
- http://files.aelc.org/uploads/1/3/0/7/130775672/lagujumejunesof.pdf
- http://files.nancyjocullen.net/uploads/1/3/2/6/132682441/4745502.pdf
- https://cdn.shopify.com/s/files/1/0431/2743/9526/files/sepudikorus.pdf
- https://cdn.shopify.com/s/files/1/0433/7614/8643/files/matricom_g_pad_ex.pdf
- https://cdn.shopify.com/s/files/1/0435/0204/3288/files/96692315999.pdf
- https://cdn.shopify.com/s/files/1/0429/1385/7692/files/wujetenosepo.pdf
- https://cdn.shopify.com/s/files/1/0434/2949/4933/files/67065715507.pdf
- https://cdn.shopify.com/s/files/1/0433/5170/3706/files/68320593197.pdf
- https://cdn.shopify.com/s/files/1/0428/9311/5558/files/gowezux.pdf
- https://cdn.shopify.com/s/files/1/0428/2561/3475/files/semofuxekijinedusad.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/runuwadobona.pdf
- https://cdn.shopify.com/s/files/1/0429/1392/3228/files/bupuzepikogu.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_off000060ac.bin` `892f2fc704048fb456762b459e91e73725cd31c95c088d2122753c4d8d64f763`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60AC	5224 bytes
`font_01_sfnt_off000072a6.bin` `757ab9037416efa2b46d139afe9cf289f368f1245014e8c0d40f51ad346894ae`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72A6	10052 bytes

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