PDF malware analysis — malicious · 58fe64dff131aa09

MALICIOUS

PDF

69.7 KB Created: 2020-11-03 20:56:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a509595ee98dea9fafd4faee9e5a5bcd SHA-1: 755e482dba65d9aead436e91a5f9ec93e8ced511 SHA-256: 58fe64dff131aa09df0fe14ef63c4cccb89edb36cd56b190a0de4e1dd7e35d01

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. The primary URL, https://cctraff.ru/aws?keyword=goliath+druid+guide+pathfinder, is a known malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to trick users into clicking it. The ML classifier also strongly flagged this PDF as malicious.

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/aws?keyword=goliath+druid+guide+pathfinder
- https://cdn-cms.f-static.net/uploads/4384039/normal_5f9914e74854f.pdf
- https://cdn-cms.f-static.net/uploads/4369773/normal_5f87dbe23628e.pdf
- https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/4072073.pdf
- https://cdn-cms.f-static.net/uploads/4377400/normal_5f90f18fdb5c6.pdf
- https://cdn-cms.f-static.net/uploads/4367302/normal_5f88ac97d9d0c.pdf
- https://cdn-cms.f-static.net/uploads/4369773/normal_5f8d1785c6dc1.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/wipotegadodorek/20885521209.pdf
- https://uploads.strikinglycdn.com/files/7225dd24-8cfa-449e-82d3-2cfcd4c63207/xololepofaxima.pdf
- https://uploads.strikinglycdn.com/files/d4e84a5d-4c45-43d3-b350-7853ac5c6d08/29085861108.pdf
- https://uploads.strikinglycdn.com/files/2b6f262a-76bd-451a-85d9-742ab0b13fd7/gelezesefosekozatexodu.pdf
- https://s3.amazonaws.com/jobavo/60039545347.pdf
- https://s3.amazonaws.com/metubevozisul/wewetirasunibarulimeka.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cb4e.bin` `77e8f86505563dc63878504d3d135d609d72efe6707c5620ac7ddcdc3641a073`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB4E	5156 bytes
`font_01_sfnt_off0000dcd2.bin` `65e8b74a9de6d125cdfee178426eca08c80262e28ce60e18c607f4b67a7d62ed`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCD2	14328 bytes

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