MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF document is identified as malicious due to its inclusion of a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is disguised as a manual for a Behringer UMC404HD audio interface. The presence of numerous embedded links, many pointing to Shopify domains, indicates a link farm or SEO poisoning tactic to distribute the malicious payload. The primary malicious IOC is the ttraff.ru redirector URL.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF 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.
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall 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.
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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/pify?keyword=behringer+umc404hd+manual+english
- http://redixapi.localgestures.com/uploads/1/3/1/4/131453293/5b85674d8fc4011.pdf
- http://files.laurenmmcollins.com/uploads/1/3/1/6/131606758/werevuleforelekuriro.pdf
- http://files.thebridgechurchmt.org/uploads/1/3/1/4/131454523/c507a7d33ba6.pdf
- https://cdn.shopify.com/s/files/1/0433/7437/9158/files/fipadorub.pdf
- https://cdn.shopify.com/s/files/1/0432/2977/3981/files/figiritewevuluvo.pdf
- https://cdn.shopify.com/s/files/1/0437/1657/5383/files/inverse_of_matrix_in_r.pdf
- https://cdn.shopify.com/s/files/1/0433/5733/9800/files/59129887209.pdf
- https://cdn.shopify.com/s/files/1/0433/7870/4536/files/92864876864.pdf
- https://cdn.shopify.com/s/files/1/0431/6259/9584/files/96290094203.pdf
- https://cdn.shopify.com/s/files/1/0432/6660/5219/files/33777876123.pdf
- https://cdn.shopify.com/s/files/1/0436/9547/2793/files/jadejeronowesinedewulup.pdf
- https://cdn.shopify.com/s/files/1/0434/7451/8180/files/46380136364.pdf
- https://cdn.shopify.com/s/files/1/0432/7905/7056/files/fodijimodirevixozegug.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_off00007bb2.bin835640b89f6b716df18b90ecb4b268dcb3933b3565a92c27a828081450dcb40c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7BB2 | 5632 bytes |
font_01_sfnt_off00008eae.bin610dd7b1c0a1673c1aaae5219f0bd17a54b443490c548069dee09a227dfd523a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8EAE | 10480 bytes |
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