PDF malware analysis — malicious · 11d53e07d718f7e0

MALICIOUS

PDF

43.4 KB Created: 2020-08-31 05:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 926b2e3a0cc7b5a68fe5d0f05692b9b4 SHA-1: eff01a53a35443626d0a618849d783cbe35e7e82 SHA-256: 11d53e07d718f7e01a129b0714417e05425499f4d0b3f96984ba37595de3c33e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting a lure for a 'free ducati workshop manual'. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful sites.

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.com/wix?keyword=free+ducati+workshop+manual
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/0a0016_f5e933c9b56742559f1ba3c35bd8685f.pdf
- https://static.usrfiles.com/ugd/b8c837_24f40ae37c9043b6b7bc1a45d3cb2a28.pdf
- https://static.usrfiles.com/ugd/217d68_605efd4490544e0fa7c6891351300f60.pdf
- https://cdn.shopify.com/s/files/1/0457/8505/5398/files/ti_dead_by_daylight_mobile_apk.pdf
- https://cdn.shopify.com/s/files/1/0427/6686/0455/files/xovomes.pdf
- https://static.usrfiles.com/ugd/b13fd1_47fd1b53bad74e3d8e56376b5cd14b03.pdf
- https://static.usrfiles.com/ugd/b8c837_e1e15348104e4cf1a43f89dd17fac07f.pdf
- https://static.usrfiles.com/ugd/f1780b_4ab687d2e95344c196e609319e357fd8.pdf
- https://static.usrfiles.com/ugd/b8c837_dbb3787194134a7f995df11206e13a80.pdf
- https://static.usrfiles.com/ugd/b8c837_8858d9293e914f639ef3c5e852b4a3c4.pdf
- https://static.usrfiles.com/ugd/b8c837_cc7f93e8b811467cb0ed3ad494484435.pdf
- https://static.usrfiles.com/ugd/b8c837_a16243ebcdbd4868bbc87085dd1323c0.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_off00005f9c.bin` `d9a61fdb922f7bf218f734904d589a7f68fa8dfb2ef361423ca6dd7e4c29d1ca`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F9C	5424 bytes
`font_01_sfnt_off000071f7.bin` `1d499fe6ce5f12225e32ddc503b65458926a2908c6b4bd768a7aff11ffab0058`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71F7	14588 bytes

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