PDF malware analysis — malicious · c45a5fe87f030ee5

MALICIOUS

PDF

45.1 KB Created: 2020-08-31 21:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e591be80eb106eb8e9641e3be13866f5 SHA-1: 91de82f5661d1153796f7501b895146dbfa9ef3b SHA-256: c45a5fe87f030ee52574fc651cb8c5737e99756ac9b0cc8e6c3de5252d923707

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=bharti+axa+general+insurance+motor+proposal+form', suggesting a lure related to insurance. The presence of multiple PDF links and a malicious redirector indicates a phishing or redirection attempt.

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=bharti+axa+general+insurance+motor+proposal+form
- https://static.usrfiles.com/ugd/b8c837_8c8c73f79ded4ae68a953d78b7be2288.pdf
- https://static.usrfiles.com/ugd/b8c837_2ae2582386cf4e27979301d401409196.pdf
- https://static.usrfiles.com/ugd/47b1e8_f9afb7b8ba694e878e91e5abef0b105b.pdf
- https://static.usrfiles.com/ugd/b8c837_aed35aa1fc134d989308ae735df3f3d2.pdf
- https://static.usrfiles.com/ugd/8b9728_98adca4d9d774c2eb40def9b88fbc2fa.pdf
- https://static.usrfiles.com/ugd/52b593_241dbfcb6d994007909467d53cd50b65.pdf
- https://static.usrfiles.com/ugd/7ef0dc_b2e823506c4745fdb247243b16556b65.pdf
- https://static.usrfiles.com/ugd/0c4177_70323786e90e4cfc923af981a3748d8d.pdf
- https://static.usrfiles.com/ugd/ceb2e8_251a493db37645aea5f35afe8222872a.pdf
- https://static.usrfiles.com/ugd/6260fe_33646114b40745cfbfe7f3c67fd18575.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_off00006753.bin` `b62cfd7f88412f720bca31dde0448965be52854cb01e3688efb60d9516c17dc7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6753	5544 bytes
`font_01_sfnt_off00007a14.bin` `19d54f14d4bcbde580843c491fa634d184953a38c52cffab79839d17b18d6799`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A14	14796 bytes

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