PDF malware analysis — malicious · 16e245714fd5fed1

MALICIOUS

PDF

41.9 KB Created: 2020-10-26 23:29:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 5c27853cd2eab96d5e53e44a6ffb67e7 SHA-1: 3951ce651c0fb41de77f599e30a91ca73d1f6da5 SHA-256: 16e245714fd5fed14316bc0d0cc436364555c5e54cabe613a7cb5ddac835beff

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body contains text that appears to be a lure, referencing 'Rockin jump application', and the file itself is flagged by ML classifiers as malicious. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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://cctraff.ru/strik?keyword=rockin+jump+application In PDF document text
- https://cdn-cms.f-static.net/uploads/4412382/normal_5f9523d7de7bf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375504/normal_5f91eca532920.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367287/normal_5f893226a9da9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366620/normal_5f8c5a420a56b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368228/normal_5f87639153f56.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/9778/7035/files/tipos_de_inteligencias_multiples.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0485/2478/7867/files/omega_seamaster_planet_ocean_600m_chronograph_manual.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/2314/6906/files/kezuresa.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0502/9462/0333/files/spiritualized_lazer_guided_melodies_320.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/6845/9670/files/tejido_conjuntivo_hematopoyetico.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0499/3145/2574/files/92037056548.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0486/7171/9574/files/39980037692.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/3343/5029/files/27642512100.pdfIn PDF document text
- https://s3.amazonaws.com/regegozumekoza/diet_for_colostomy.pdfIn PDF document text
- https://s3.amazonaws.com/jiwisigetizoxif/cherry_tree_poem.pdfIn PDF document text
- https://s3.amazonaws.com/zunaduxa/48337102767.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e7b88342-0886-45e3-9b6a-6073949f231c/25522148464.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c4fc215f-dbeb-466e-9629-98a917f2c548/how_to_spin_a_penny.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b813e791-a769-40a1-bda5-31878fd9f9c7/68140602205.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/49c4c0b3-9152-45df-8f83-0f689a7d8c38/walurakakizofomolonod.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/23674f34-9f0f-4212-9c87-975b2c725d6b/gutejonedegomopisuw.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d34f97e1-2eab-47f5-aa7a-43d55aefebdf/91820897569.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a38a30c2-7314-446a-8c2b-37effc69dc15/4231556269.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6ee370f4-d393-43ba-b5f5-e453162361fa/bekifej.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cafe6d4d-9b59-4f9b-84a1-b0c3c6539285/53973756152.pdfIn 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_off00006489.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6489	4952 bytes
SHA-256: `1ba4fe0b974a3bbda8a92a16c4a4c85d3fedcc1b171a1592cfe217ca637ece55`
`font_01_sfnt_off00007550.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7550	10904 bytes
SHA-256: `b7adc1dd9227e040291ea7c377cb4055c468f091adc31431eba4d0e30bf4f981`

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