PDF malware analysis — malicious · f5c4d3871ecf1e5c

MALICIOUS

PDF

44.8 KB Created: 2020-11-01 10:41:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 8710579d4a500adb73275b68633d1260 SHA-1: 3845df2cf388fe2e5793c836b08ea67f7eaea9a8 SHA-256: f5c4d3871ecf1e5cfbedef17f1600e32fae64ab1376f8b16db6ed1d5a2a4e351

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/aws?keyword=upcoming+ultrawide+monitors+2020'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect the user to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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://cctraff.ru/aws?keyword=upcoming+ultrawide+monitors+2020 In PDF document text
- https://cdn-cms.f-static.net/uploads/4383678/normal_5f90966667165.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369777/normal_5f88929be2d65.pdfIn PDF document text
- https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/2b34abe251.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446045/normal_5f9e04d1881d9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370268/normal_5f8f7334dd31a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387218/normal_5f969de8d17cd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371509/normal_5f9856032345d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426271/normal_5f99d948e1e78.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/1bb6190c-b0a2-4657-852e-a5f3f70cabb9/xelififozibadupezamibon.pdfIn PDF document text
- https://s3.amazonaws.com/purufiz/5613070744.pdfIn PDF document text
- https://s3.amazonaws.com/pusolefosex/belle_amie_maupassant.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_off00006d3a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D3A	5752 bytes
SHA-256: `44bb5896c0c06c6823065e3fdb3903d06ec8bd6ba367674ffa48d6cda469d483`
`font_01_sfnt_off000080cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x80CC	11056 bytes
SHA-256: `8bba5fa33ac4dbcca9ecf8361049ab44d78461527505e7e01bd8d17837355221`

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