PDF malware analysis — malicious · ad157d2dd2507165

MALICIOUS

PDF

41.2 KB Created: 2020-11-05 11:17:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3c2efa61dd24158f65ace8c0fe68b38e SHA-1: 76e75efc06f395b58a428e94b633e62404d46338 SHA-256: ad157d2dd2507165ac3dfb3a496e120bd231f6b83141bc4efa96723ba329107a

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external websites and appear to be part of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting an attempt to lead users to harmful content. The ML classifier also strongly indicated maliciousness.

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://ttraff.me/123?keyword=frog+dissection+lab+manual
- https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/5932287.pdf
- https://cdn-cms.f-static.net/uploads/4405184/normal_5f983375a5c69.pdf
- https://cdn-cms.f-static.net/uploads/4365553/normal_5f9f432f95fcb.pdf
- https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/belijenugebiri.pdf
- https://pitimonajavigo.weebly.com/uploads/1/3/1/3/131383860/sulifupozagasama.pdf
- https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/4441521.pdf
- https://guzuzixud.weebly.com/uploads/1/3/4/3/134357052/karawuvelepapidup.pdf
- https://bopilewe.weebly.com/uploads/1/3/4/5/134523270/xusapokep.pdf
- https://cdn-cms.f-static.net/uploads/4367947/normal_5fa3c1decc037.pdf
- https://cdn-cms.f-static.net/uploads/4366008/normal_5f87042fdc7e8.pdf
- https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/2f71ea5ecff44a.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/putelekireza/golf_gps_apps_for_iphone.pdf
- https://s3.amazonaws.com/zasepo/25299355209.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_off000063f0.bin` `01aadc3857b5faa1ce99082a7fa4cc386c2478bc8ec873c495cd442bbda46be9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63F0	5352 bytes
`font_01_sfnt_off00007613.bin` `1cc1e7ca504b2126f6cbedfc1f71d2cc228087856cbc2dac840f2b0dd86cc369`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7613	9972 bytes

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