PDF malware analysis — malicious · 88d2f71a6891ca44

MALICIOUS

PDF

39.8 KB Created: 2020-08-31 12:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ee2c59debd1c247320839052ae9583ed SHA-1: 0c5cce89d432a2a08918553f55f1bf710d89aa53 SHA-256: 88d2f71a6891ca446d0e3e19f2152c2f47146e7e4d1bc9cb49efc2f75c962026

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users into downloading further malicious content. The document body, though heavily obfuscated, contains the text 'The secret. download' and the malicious URL, suggesting a social engineering pretext. The presence of a large number of external PDF links, many pointing to static.usrfiles.com, indicates a link farm used for SEO poisoning or to obscure the final malicious destination.

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.cc/wix?keyword=the+secret.+download
- https://static.usrfiles.com/ugd/b8c837_465373ec0b344726a94903262a0b3410.pdf
- https://static.usrfiles.com/ugd/b8c837_d432e32bd3b54e0988582ef2b3f4adce.pdf
- https://static.usrfiles.com/ugd/e4ff69_9854c6b5562e490bb6837f7cbfd6560a.pdf
- https://cdn.shopify.com/s/files/1/0431/8520/9512/files/wizobuwazesitax.pdf
- https://cdn.shopify.com/s/files/1/0432/1817/4107/files/case_study_of_a_child_in_english.pdf
- https://cdn.shopify.com/s/files/1/0440/4684/4054/files/data_smoothing_techniques.pdf
- https://cdn.shopify.com/s/files/1/0462/6835/0626/files/22870452161.pdf
- https://static.usrfiles.com/ugd/b8c837_4d8a4bc43a6140498cef211b3bd3bf4d.pdf
- https://static.usrfiles.com/ugd/b8c837_3450fa8f60ba4974a974c5ba95025200.pdf
- https://static.usrfiles.com/ugd/b8c837_cde69cece01944fc9a72117725dfb31a.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005265.bin` `9a4ae384f766f2296057f780909ab9e1d5c29cff486a95e7d9195bc0d8b65506`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5265	5100 bytes
`font_01_sfnt_off000063c1.bin` `d880868188fbbbc0aca91182df3432ff00bc5ad71403a8b3bfe7ba1dcbfd599f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63C1	2116 bytes
`font_02_sfnt_off00006d63.bin` `416ed679a235c1c429a877fda3a86ea4c1ed1a7a060ddb9b27e11a49ea401886`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D63	11576 bytes

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