PDF malware analysis — malicious · 158ea3bc2ca0ba61

MALICIOUS

PDF

40.9 KB Created: 2020-08-31 10:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d32b1b0701732b7098d9d0377b631a0b SHA-1: be74981446e83ecc8b22feb8ffc08f22f0a758fc SHA-256: 158ea3bc2ca0ba617fbb0079b4389f65f3a809a8b6d940dd014af772f2b1cd31

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=sonicmaster+subwoofer+driver'. This URL is embedded within the document body, suggesting an attempt to trick the user into clicking it. The presence of numerous other PDF links also indicates a link farm, likely for SEO manipulation or to obscure malicious activity. The ML classifier strongly flagged this PDF as malicious.

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.club/wix?keyword=sonicmaster+subwoofer+driver
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b56239_9590beea559040a4b868f2e7fbe6b3f5.pdf
- https://static.usrfiles.com/ugd/dc8a8e_a1fe653456a14441ad8bb3fa610e4fee.pdf
- https://static.usrfiles.com/ugd/902d29_6a53c92c29924326b0802b5f4af23a55.pdf
- https://static.usrfiles.com/ugd/ddb60a_64a5b41bb03b47f48aeb7b4fe4e4cad9.pdf
- https://static.usrfiles.com/ugd/21e6f2_7ab73e952814460cb3ef76014e6fc0c8.pdf
- https://static.usrfiles.com/ugd/1cfe37_f1f0d3c1f0e94cca8bdbb2ff855ce4b0.pdf
- https://cdn.shopify.com/s/files/1/0430/6327/9767/files/ziwenitepuxexoto.pdf
- https://cdn.shopify.com/s/files/1/0432/2656/2722/files/4250909855.pdf
- https://static.usrfiles.com/ugd/850f07_2a9ade2e495c4bc5b0e56fb6c7787529.pdf
- https://static.usrfiles.com/ugd/8e1900_0e93de641fec4c3893b885c2c139ac03.pdf
- https://static.usrfiles.com/ugd/b8c837_8efc84ac797149e7b103bb65430a3f90.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_off00005cb8.bin` `a5575f14b2daf3a7b7cce2fbdf0d0c7935697a2da87f7b39725b6020e91109bc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5CB8	5532 bytes
`font_01_sfnt_off00006f71.bin` `b29fe680bdb030f5f261f1b70011beaceb944ba4310fde3893b1e67fe676b614`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F71	12240 bytes

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