PDF malware analysis — malicious · 19bab10cdb02de8b

MALICIOUS

PDF

49.9 KB Created: 2020-11-06 18:35:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 19a1e2594af3e7e1165bf640d2799f3b SHA-1: 7aa0e5af1e1a03d9345804b5e8fa0e04c2cf87a7 SHA-256: 19bab10cdb02de8b27240da8161c975328beb712d9905027d80c19f696c8af4f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. It embeds numerous URLs, with the primary malicious link identified as 'https://ggtraff.ru/aws?keyword=japan+climate+patterns'. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the identified malicious URLs, suggesting a lure to external content.

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://ggtraff.ru/aws?keyword=japan+climate+patterns
- https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/vikugaruxovaza_ketoz.pdf
- https://cdn-cms.f-static.net/uploads/4389816/normal_5f9426a070dc2.pdf
- https://cdn-cms.f-static.net/uploads/4454048/normal_5fa22d4cdc989.pdf
- https://moxowikoxub.weebly.com/uploads/1/3/4/0/134096036/142ea.pdf
- https://joleziravakejar.weebly.com/uploads/1/3/4/4/134460301/gozudiwapuz_gikogima_sajivumeg_kazufotekabij.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://pafegum.files.wordpress.com/2020/11/xumakosokidazok.pdf
- https://nevosaxovib.files.wordpress.com/2020/11/fizimobaruweboratiweti.pdf
- https://vevarog.files.wordpress.com/2020/11/duwiwimigag.pdf
- https://fufezirures.files.wordpress.com/2020/11/95808703302.pdf
- https://nuziwonuw.files.wordpress.com/2020/11/sejuvemisibagabi.pdf
- https://xazadawedi.files.wordpress.com/2020/11/42718997095.pdf
- https://s3.amazonaws.com/buxoparadazegu/sh_digraph_worksheet.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_off000085e9.bin` `33388f30c9496804aba1609fa138ac7b420a09d826eef9d9b4f2755c692fd6e4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85E9	5068 bytes
`font_01_sfnt_off0000970d.bin` `54c8eda4d2470527e7183a9f4b98f8b62faf20f66edcc7c2cbe461c1721d797f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x970D	10688 bytes

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