PDF malware analysis — malicious · 82f5a7090eafb7ee

MALICIOUS

PDF

43.9 KB Created: 2020-10-28 01:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 4d567857d255e0ad38dc77ed8296c715 SHA-1: 9a3d233b41f307e4ea576587874598d87c8418b8 SHA-256: 82f5a7090eafb7ee2b735631f6d8689a1871f2fc6fd7024c4a2bd36cf0876c22

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics as malicious, specifically for containing links to known redirector infrastructure and a large number of external links. The document body contains a URL that points to a known malicious redirector, and also lists numerous other URLs, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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.cc/123?keyword=cannibal+spell+for+king+unis In PDF document text
- https://zatazonikafude.weebly.com/uploads/1/3/4/3/134340422/wuwasemalag.pdfIn PDF document text
- https://mexugagerow.weebly.com/uploads/1/3/4/4/134482965/166588.pdfIn PDF document text
- https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/jazoxulipube.pdfIn PDF document text
- https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/e9ff54.pdfIn PDF document text
- https://porujigiwafixuf.weebly.com/uploads/1/3/4/3/134373975/8107949.pdfIn PDF document text
- https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/3834098.pdfIn PDF document text
- https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/242413.pdfIn PDF document text
- https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/1035055.pdfIn PDF document text
- https://juporolo.weebly.com/uploads/1/3/1/3/131380745/xokoxivibawirodotek.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372702/normal_5f9151fd79778.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378167/normal_5f8fc091cfec0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374957/normal_5f8cbbfe6bdf6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372719/normal_5f8b53c555033.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/9624/2856/files/edison_high_school_tulsa_football.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0502/4979/3698/files/xezumotuwinufabelodox.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/4361/8965/files/android_operating_system_names_in_order.pdfIn PDF document text
- https://s3.amazonaws.com/tamobalasu/mechanical_aptitude_test_questions_and_answers.pdfIn PDF document text
- https://s3.amazonaws.com/zetare/gorowi.pdfIn PDF document text
- https://s3.amazonaws.com/ninazarila/votaruku.pdfIn PDF document text
- https://s3.amazonaws.com/lebaxa/53466248327.pdfIn PDF document text
- https://s3.amazonaws.com/zabevog/areal_differentiation.pdfIn PDF document text
- https://s3.amazonaws.com/gumegulaxi/funoren.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_off00006def.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6DEF	5180 bytes
SHA-256: `9c2247e806fe37cf5addea85c8248f9093306639b9e7237f40a08f6edbaef3c6`
`font_01_sfnt_off00007f99.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F99	10032 bytes
SHA-256: `9d9598850cda503070fc4f237761d290e49108908ed1efa0be00de4d1aba291b`

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