PDF malware analysis — malicious · d5d2849ac5b5c9f7

MALICIOUS

PDF

52.8 KB Created: 2020-08-31 06:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c7427548db0d5742de4c0b82a16e8520 SHA-1: 90c5877045fa078ed0a5207639584b48955e6bcc SHA-256: d5d2849ac5b5c9f76c3d37d0d3718b186b16e39b62278e4647a8fe8eddcd78d2

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.ru, which is designed to lead users to malicious content. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of a link farm suggests an attempt to broaden the reach of the malicious content.

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.ru/wix?keyword=lord+of+the+rings%253A+conquest
- https://static.usrfiles.com/ugd/4725f1_66658b27cc524228b6da0e9d69f0b9bf.pdf
- https://static.usrfiles.com/ugd/1b8612_b4009943aae640e1abc79c276a77acb1.pdf
- https://static.usrfiles.com/ugd/97493d_fad2367237854918a13e2d3303f8ab32.pdf
- https://static.usrfiles.com/ugd/e4a001_7fddc1b4ae41460aa0733719d8abe6cb.pdf
- https://static.usrfiles.com/ugd/b8c837_89ad23fa5c5d4c0ca8e745aeb109c8d4.pdf
- https://static.usrfiles.com/ugd/cbdbb6_a8a8304ee4b0460bb79c06acd12b93e9.pdf
- https://static.usrfiles.com/ugd/2e4eb4_0103635450e44251812dea3ef59455d1.pdf
- https://static.usrfiles.com/ugd/9c43ec_818f73a426f04aa081b6d23bdc643e85.pdf
- https://static.usrfiles.com/ugd/33a2e4_66053e78da884611b58ac369463ba1d1.pdf
- https://static.usrfiles.com/ugd/906e9f_e4e7f691d7da45afad8976faf61900ca.pdf
- https://static.usrfiles.com/ugd/b8c837_d424ac2844b1474390a801dd8b290f2a.pdf
- https://static.usrfiles.com/ugd/b7ed05_ceebc63c88444a1a8414485dce58f1f4.pdf
- https://static.usrfiles.com/ugd/b8c837_48aad82aea9f4dc9ae1c5ac7a2329b86.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/
- https://static.usrfiles.com/ugd/e4a001_7fddc1

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000919f.bin` `c2bf01c24023a58109ab88a02cc802a7b7211602a05429b436bf23b8c0b53bb0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x919F	5156 bytes
`font_01_sfnt_off0000a32a.bin` `748da21825e2452adae5cc9b246e5c2d13a5abcd32a863d1c7e62c8f118a0682`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA32A	10332 bytes

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