PDF malware analysis — malicious · 51235e92d114790e

MALICIOUS

PDF

38.7 KB Created: 2020-08-29 20:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5c52947c3346b0b9793de0ba3e6e5683 SHA-1: fd0e34224073ec931476d983f4ed0745bc9c9d70 SHA-256: 51235e92d114790ecf4d41db73e2eff6e942b5eb640904cc42b84944a7cebdde

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of these links, ttraff.com, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'holt handbook' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The primary attack pattern involves using a seemingly innocuous document to redirect users to malicious infrastructure.

Heuristics 3

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.
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/wix?keyword=holt+handbook+sixth+course+answer+ke
- https://static.usrfiles.com/ugd/b8c837_d8353d9a4b014656bbdf633219a8d520.pdf
- https://static.usrfiles.com/ugd/b8c837_24eca2a73b324c8b913d0c713845b476.pdf
- https://static.usrfiles.com/ugd/b8c837_61b3d792c6924598b05474a1d9757e8c.pdf
- https://static.usrfiles.com/ugd/b8c837_a920866a8e33486899fdeb664e02dd8b.pdf
- https://static.usrfiles.com/ugd/b8c837_04bdddd48700441bb53d7274cfbef8dd.pdf
- https://static.usrfiles.com/ugd/0f5b72_251df0f7940843b4b17921d935a786f7.pdf
- https://static.usrfiles.com/ugd/b8c837_8e4f0ebc1dc04cd281f6761e5a259a00.pdf
- https://static.usrfiles.com/ugd/b8c837_aa8cf9795c584fa1aabfd951385e264b.pdf
- https://static.usrfiles.com/ugd/b8c837_1d29f84383674b1c9f043a0dd805f1cf.pdf
- https://static.usrfiles.com/ugd/b8c837_e0b36f88c26a46d19c216f3f97faa2aa.pdf
- https://static.usrfiles.com/ugd/b8c837_6077fea1ecaa4c87afd75ccf61108b86.pdf
- https://static.usrfiles.com/ugd/b8c837_004721e6029e43778513f5a4f5f0b2a1.pdf
- https://static.usrfiles.com/ugd/b8c837_e022dddd4185465698943bf8c13a8487.pdf
- https://cdn.shopify.com/s/files/1/0450/0422/6724/files/7342783516.pdf
- https://cdn.shopify.com/s/files/1/0438/2880/5789/files/82785011669.pdf
- https://cdn.shopify.com/s/files/1/0440/6365/4040/files/konsep_dasar_pendidikan_agama_islam.pdf
- https://cdn.shopify.com/s/files/1/0432/8862/5316/files/95300181547.pdf
- https://cdn.shopify.com/s/files/1/0430/6409/8970/files/platform_78_cafe_bandung.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_off00005849.bin` `ecc7765f46eb7b9d8165955576b4298d0ff939c0436989fe77ea5ace3f75f12e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5849	5352 bytes
`font_01_sfnt_off00006a7c.bin` `1cc64ca971135e5a276b4854e646918b9997ba6981991c84fb16c3906742eb13`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A7C	10508 bytes

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