PDF malware analysis — malicious · 1a5a741813efb818

MALICIOUS

PDF

44.2 KB Created: 2020-10-29 04:35:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 2c279e3989491d0e7c2baf46c34f93c9 SHA-1: fb00251aaee22340f535ae915853e7b92bd86d1b SHA-256: 1a5a741813efb8189ca5e3b67a42026e3d6e69cdece42150db16b9b5bb36493a

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a machine learning classifier and contains numerous embedded URLs. One URL, https://cctraff.ru/pify?keyword=cosplay+kagome+kikyo, is flagged as a known malicious redirector. The document appears to function as a link farm, likely intended to lead users to malicious content or phishing sites, aligning with a spearphishing attachment attack vector.

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://cctraff.ru/pify?keyword=cosplay+kagome+kikyo In PDF document text
- https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/7137294.pdfIn PDF document text
- https://wilujogid.weebly.com/uploads/1/3/4/3/134347442/vovep_jotojazevifu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4390324/normal_5f8ed5f824ae3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387424/normal_5f925f8581f55.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404965/normal_5f95c762d71d6.pdfIn PDF document text
- https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/rudasokoten.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367312/normal_5f8e934fca7b3.pdfIn PDF document text
- https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/4fab3e13.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379359/normal_5f95c57813389.pdfIn PDF document text
- https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/lemitapafipidi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365607/normal_5f87746b65333.pdfIn PDF document text
- https://gadigode.weebly.com/uploads/1/3/2/6/132680949/4317019.pdfIn PDF document text
- https://gixapogaruxa.weebly.com/uploads/1/3/4/3/134331356/lesojif.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380699/normal_5f8e19cc4f878.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4414515/normal_5f95df6358f95.pdfIn PDF document text
- https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/devuxupujikeninaferi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415767/normal_5f9a17d0c1beb.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/33cab063-b0b1-40f6-ace7-2d06beb0f376/tori_black_x_art.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/061e9904-d3cb-4dae-a988-fa825a6ed6fa/mejexiwesusewemopumas.pdfIn PDF document text
- https://s3.amazonaws.com/pisedij/78603121449.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dbfb0c4f-193e-428e-9691-09dcb6511b3f/xonilapilogalat.pdfIn PDF document text
- https://s3.amazonaws.com/memul/17859225335.pdfIn PDF document text
- https://s3.amazonaws.com/pegek/mount_allison_university_excel_training.pdfIn PDF document text
- https://s3.amazonaws.com/bejenosugede/gijawesesa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/984f7f45-dc60-4fd2-a7fb-adf790534650/80462742758.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/445b30d2-24d1-48d4-8de9-1e30e4ca57c3/61075180609.pdfIn PDF document text
- https://s3.amazonaws.com/jebokizez/edgestar_washer_dryer_combo.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_off00006c66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C66	5112 bytes
SHA-256: `0857ee4fdf38516d7870ed5a454d7fa172e233df234638def254e796ef5fb742`
`font_01_sfnt_off00007dcb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7DCB	10908 bytes
SHA-256: `6311f5596a7cdab3920c21daeea04ff3ecb750134dd3788f7b839e141cb2f3cc`

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