MALICIOUS
184
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file contains a large number of embedded links, many of which point to disposable hosting and redirect to a known malicious domain. The document body, though heavily obfuscated, contains text related to appearance and a date, suggesting a lure. The primary malicious URL identified is https://yafferge.ru/strik. The ML classifier strongly indicated maliciousness.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
Heuristics 5
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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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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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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://yafferge.ru/strik?utm_term=why+appearance+is+not+so+important In PDF document text
- http://mobeditobaxul.scienceontheweb.net/how_to_turn_on_apple_wireless_keyboard_2011.pdfIn PDF document text
- https://cdn.sqhk.co/sixojifez/kG7ge7E/penguin_slice_ice_game_online.pdfIn PDF document text
- http://pimifawimonidij.mywebcommunity.org/age_of_exploration_vocabulary_worksheet_answers.pdfIn PDF document text
- https://cdn.sqhk.co/suzagofi/jeQ4ieK/26050856716.pdfIn PDF document text
- https://cdn.sqhk.co/sozodumupof/aOIheeA/pet_simulator_giant_penguin_code.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/664b4879-1e40-443a-8762-cda151b1fd49/20657201862.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bc4d586e-3c95-4a85-a3df-88c7ae9d75d1/laxifedejinowexonosuves.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5baf900f-2001-4adc-adb0-91949a3dec41/zoporapigemapazurix.pdfIn PDF document text
- https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_1563058d5b8a43f6953921a9fe4c2e88.pdf?index=trueIn PDF document text
- https://6ce95562-7558-49ee-a7b0-b3003db3b0e9.filesusr.com/ugd/d13e1f_8efbc93c730e4a4095b0c5b1965b0ac3.pdf?index=trueIn PDF document text
- https://df1d5e35-4e67-4e57-ba41-6141a32c4ecb.filesusr.com/ugd/c54278_cf27c29707c54fcd88c951e6baa115ad.pdf?index=trueIn PDF document text
- https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_11401c90e18848ccbd13ee15cc4d2080.pdf?index=trueIn PDF document text
- https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_9373958a28b340dc888a2da0fb06e057.pdf?index=trueIn PDF document text
- http://sutexuvidag.myartsonline.com/john_deere_48_mower_deck_parts.pdfIn PDF document text
- https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_4071eed6018b420aa00f4e5dd24641f9.pdf?index=trueIn PDF document text
- http://kawerulim.onlinewebshop.net/riduk.pdfIn PDF document text
- http://fepetixapokurob.myartsonline.com/jezusiwomaxenorefo.pdfIn PDF document text
- https://6b52f5a6-db44-4d3e-8337-ab33c729cb13.filesusr.com/ugd/f4de5e_01c089327f644196a69b1b7f95716628.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/22e1f73a-9517-4a90-8182-d26950d59232/85806088358.pdfIn PDF document text
- https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_15d25f25d1064f47873a07da5fa98b5c.pdf?index=trueIn PDF document text
- https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_cacde6f9656b473ca0d6841fbe2407c3.pdf?index=trueIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000ecfe.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xECFE | 5256 bytes |
SHA-256: f40b335b13fd299c6738dfa12506ac1de85946bcf65c926a279344da92d6d2b0 |
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font_01_sfnt_off0000fec7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFEC7 | 10416 bytes |
SHA-256: 51aeb4e9907f597053f6c795e870bbdc9d73b567f759a03947e5262b5a4f5541 |
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