PDF malware analysis — malicious · c8a7e6e096d70ae3

MALICIOUS

PDF

46.2 KB Created: 2020-11-09 05:58:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d2872732c0fb2c669f3a9073823bb42c SHA-1: 10d58e6f34e58a9271904dc4444787e74564bb41 SHA-256: c8a7e6e096d70ae3eb82c7059fdf9214fb9e437fa6b3d8898e59fd80bd6076b8

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of embedded links, with a critical heuristic identifying it as a link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ggtraff.ru/123?keyword=apush+chapter+23'. While no scripts were extracted, the structure and heuristics strongly suggest a malicious intent to redirect users to harmful sites, likely for phishing or malware delivery.

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/123?keyword=apush+chapter+23
- https://cdn-cms.f-static.net/uploads/4380395/normal_5fa2fcce2b076.pdf
- https://cdn-cms.f-static.net/uploads/4401518/normal_5f931e5b05e8a.pdf
- https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/8693346.pdf
- https://cdn-cms.f-static.net/uploads/4376362/normal_5f8baec39bcc5.pdf
- https://cdn-cms.f-static.net/uploads/4370089/normal_5f925ab39bbda.pdf
- https://cdn-cms.f-static.net/uploads/4385424/normal_5f90e6d60eab9.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/wegemebufojafak/microbiology_lecture_notes.pdf
- https://uploads.strikinglycdn.com/files/736b8b89-8ddb-4420-8cab-5972fac3e8e4/the_complete_penny_stock_course_free_download.pdf
- https://uploads.strikinglycdn.com/files/581876ac-0133-4902-9cf8-5b9dc52053a8/18898053694.pdf
- https://s3.amazonaws.com/rupatojuko/vonagibatuzovof.pdf
- https://s3.amazonaws.com/sinamozagemoger/acl_njcl_national_latin_exam.pdf
- https://s3.amazonaws.com/vavebufevodutob/pepapavesozad.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_off000076cd.bin` `315e410a6ffae5bf0c57ca6fca9001cf5fd9279abd2fc882f47cff580e4d14f6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x76CD	5276 bytes
`font_01_sfnt_off000088b5.bin` `c03db8a7bd7247c4e0da981f2eb3d35015c002317de8e227fbfdd0ba66036578`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88B5	10524 bytes

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