PDF malware analysis — malicious · 28cf630dbb03e069

MALICIOUS

PDF

164.2 KB Created: 2020-08-30 03:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1ee71ed9d12a8b950542d85693ed5e93 SHA-1: f4170bc1cffe5cf944f6e5f3fb220b9d880859a8 SHA-256: 28cf630dbb03e069892be64b4498ddcc621302e9acceaf0ae664f0fbe1d8cc0f

92 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing indicating a malicious redirector link to 'https://ttraff.ru/wix?keyword=codex+heretic+astartes'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. No scripts were extracted, but the presence of a malicious URL is sufficient to classify this as a delivery mechanism for a potential attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 3

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.
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=codex+heretic+astartes
- https://static.usrfiles.com/ugd/affaa6_0f82621b7f8c4546801d4e6621132a96.pdf
- https://static.usrfiles.com/ugd/a771bd_26da524b02864c528d99f140d84328b7.pdf
- https://static.usrfiles.com/ugd/b8c837_e4070b95493a40ac9285ce3d84f40896.pdf
- https://static.usrfiles.com/ugd/79e5df_6fc5b8b59b0d45258ad8a49f5edbb7c6.pdf
- https://static.usrfiles.com/ugd/b8c837_5e3700100bf8468690f178499c8e90fc.pdf
- https://static.usrfiles.com/ugd/5fd5c1_e8bff6b73de7427bb35795e6def32ed5.pdf
- https://static.usrfiles.com/ugd/865d50_a204e115f70a4fd991ce57fcbd625ec1.pdf
- https://static.usrfiles.com/ugd/764aaa_a2eddce38ab04e0ca1287b52f6dc4fc4.pdf
- https://cdn.shopify.com/s/files/1/0440/1476/4190/files/53338140221.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bopeberovejaxurid.pdf
- https://cdn.shopify.com/s/files/1/0428/3550/9415/files/salodekejopofepegapokul.pdf
- https://static.usrfiles.com/ugd/b8c837_195e3f0534ea465ca49fba8be2f43f65.pdf
- https://static.usrfiles.com/ugd/b8c837_bd2509dd60c8478d80cab159c50a1e43.pdf
- https://static.usrfiles.com/ugd/0a0016_dde5e49590874cc48c3a95f0ec423f14.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_off000232dd.bin` `bd41b9963de30553bcd319c4dc5beab9667cdbde17faf6ae90b5f09e469780b3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x232DD	4768 bytes
`font_01_sfnt_off00024326.bin` `4f997902366c8d4f74a56a19635cdfa790e79e640945be39c2fab1f3a06af473`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x24326	16248 bytes
`font_02_sfnt_off000274c4.bin` `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x274C4	4324 bytes

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