PDF malware analysis — malicious · aa1554cc140652cb

MALICIOUS

PDF

42.9 KB Created: 2020-10-25 22:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26

MD5: 57e148e8a865aeee4e1b35b55a13ee39 SHA-1: efc4ae7aec4b70d977a59a5cf3e1d661c3b76c7e SHA-256: aa1554cc140652cb26e0e1bfd73963863e78a68e90982713c6bebcaefafba791

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to disposable hosting services and appear to be part of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and the primary URL, suggesting a lure to potentially malicious content.

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://gettraff.ru/strik?keyword=how+to+get+elite+void+osrs In PDF document text
- https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/6b3d598.pdfIn PDF document text
- https://jafakatulo.weebly.com/uploads/1/3/4/3/134353771/4724524.pdfIn PDF document text
- https://xukaxikerebata.weebly.com/uploads/1/3/4/0/134042698/xolumifewi_kasos_donijaxel_kumipoga.pdfIn PDF document text
- https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/dalamazerozana_buwalukozoj_nuluxozudowabal.pdfIn PDF document text
- https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/7749793.pdfIn PDF document text
- https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/zumenaxaja-jivaj-giluvatuju-kimuti.pdfIn PDF document text
- https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/3035412.pdfIn PDF document text
- https://zemuxarasojutin.weebly.com/uploads/1/3/4/3/134374283/wuxaseluwid-winibigeminafe-todikokeroxo.pdfIn PDF document text
- https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/8239772.pdfIn PDF document text
- https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/devuxupujikeninaferi.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/tonemakopinibem/fuller_neurological_examination_made_easy.pdfIn PDF document text
- https://s3.amazonaws.com/suximawo/mofoneraxodobokazejofoz.pdfIn PDF document text
- https://s3.amazonaws.com/jadudusujuje/87459945897.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c7f1f897-2f26-404e-a2af-c8e321c4281e/tidatevoxaveniwavodixasaj.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6d98c3e7-debb-4733-94fc-70cad9f22a77/no_game_no_life_volume_7_amazon.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2a3ed8a3-6c00-4c38-8c00-33498dfe5332/jewilesumisigokimimijame.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/9782/8760/files/wipamano.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/1114/5365/files/air_france_flight_296_crash_video.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/9925/3661/files/isidore_newman_school_football_schedule.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_off00006867.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6867	4896 bytes
SHA-256: `865f43d5f1472be652e53005ba50e7b015e8513c5c949855223ca1dd4e2205f4`
`font_01_sfnt_off00007934.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7934	10864 bytes
SHA-256: `d1ba67999ceb3f1b7e98a41c8cf1eaa74d54af7d4993bae729a80b382db0aa33`

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