PDF malware analysis — malicious · a93035eb1aca22f0

MALICIOUS

PDF

42.7 KB Created: 2020-11-08 04:02:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26

MD5: 7ab3c9562f1ee193e21ed251c6b5f1b1 SHA-1: c6e12101741864834ca97b861e0212ab424e723b SHA-256: a93035eb1aca22f00a8813735f0f1fddadee934ce921473f66b72068f6069261

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to seemingly benign PDF files, but also includes a link to 'trafftec.ru' which is likely malicious. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links generated for SEO purposes, suggesting a spam or phishing campaign. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
External URI info PDF_URI

PDF contains an external URL action
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://trafftec.ru/123?keyword=the+snapping+of+the+american+mind+pdf PDF link annotation
- https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/3253553.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368246/normal_5fa5d0f3639ab.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/zuxadol/vajurupubopipal.pdfIn PDF document text
- https://fizafadolozu.files.wordpress.com/2020/11/31713389540.pdfIn PDF document text
- https://s3.amazonaws.com/nakevoja/levozofukeba.pdfIn PDF document text
- https://s3.amazonaws.com/bitajemisajoz/guxelamebedu.pdfIn PDF document text
- https://s3.amazonaws.com/gifiz/2020_united_states_presidential_election_list.pdfIn PDF document text
- https://dukekewakoj.files.wordpress.com/2020/11/pivot_animator_4._1_free.pdfIn PDF document text
- https://gazolikid.files.wordpress.com/2020/11/nafixidesakikiguvofex.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_off00006761.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6761	5488 bytes
SHA-256: `ac37ec8a8aa977926030b678a6ae96b08e06b97374a5a9f76b258e018fd19480`
`font_01_sfnt_off000079e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x79E3	11076 bytes
SHA-256: `f1d3984a221b3fff61be044740a2c0fdeb63bbbd1bc6fe3865c3ec4d11117a19`

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