PDF malware analysis — malicious · 9b24cb326e310c49

MALICIOUS

PDF

46.0 KB Created: 2020-10-28 03:27:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 4543b4e59bd889312c6541ce413d4d80 SHA-1: edcce89214f6f6d6582779950321d457d834aca5 SHA-256: 9b24cb326e310c4958a8fa027873a5dc0dc9fa816fe1dc29953e62e3cdd6a172

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high density of external links, many pointing to S3 buckets and Shopify domains, suggesting an attempt at SEO manipulation or link farming. One critical heuristic identified a link to a known malicious redirector at 'https://ggtraff.ru/strik?keyword=subtraction+with+pictures+worksheets+for+kindergarten'. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful content.

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/strik?keyword=subtraction+with+pictures+worksheets+for+kindergarten In PDF document text
- https://cdn-cms.f-static.net/uploads/4393900/normal_5f8f6f427da5c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367313/normal_5f97d95f2bc62.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371806/normal_5f8c0ea14d379.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368964/normal_5f8961954a7f6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371812/normal_5f98c5e96bdea.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374196/normal_5f8a962bbd18c.pdfIn PDF document text
- https://poxozebirineba.weebly.com/uploads/1/3/4/4/134447173/5305088.pdfIn PDF document text
- https://xotukejurivaj.weebly.com/uploads/1/3/4/0/134016857/4770500.pdfIn PDF document text
- https://sejabekozifox.weebly.com/uploads/1/3/4/2/134266090/didel.pdfIn PDF document text
- https://wulonuvesiga.weebly.com/uploads/1/3/4/3/134362584/jotilibef-belawoli-xesasakamas-gadukutu.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://s3.amazonaws.com/subud/79342657171.pdfIn PDF document text
- https://s3.amazonaws.com/pasawexawinogad/68351127676.pdfIn PDF document text
- https://s3.amazonaws.com/sugaguxagu/34019061014.pdfIn PDF document text
- https://s3.amazonaws.com/tobobowu/82241560902.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0502/2007/3150/files/58405982531.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0479/6694/5447/files/39040491056.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/3785/0262/files/kundli_software_apk_file.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/1568/3743/files/channel_7_rockhampton_tv_guide.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0479/4721/9100/files/report_writing_topics_for_class_12.pdfIn PDF document text
- https://s3.amazonaws.com/mesotodimus/makalah_angiospermae.pdfIn PDF document text
- https://s3.amazonaws.com/mibiwivanetuj/periodic_table_with_atomic_mass.pdfIn PDF document text
- https://s3.amazonaws.com/gelawiweza/islamic_encyclopedia_in_urdu_free_download.pdfIn PDF document text
- https://s3.amazonaws.com/zidenigad/comment_fusionner_des_en_ligne.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006548.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6548	5664 bytes
SHA-256: `2e18dcd3d107da45af7b9849193f9a584ed9e842c834f5bb57c23dfdd41dace5`
`font_01_sfnt_off0000788d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x788D	10352 bytes
SHA-256: `6123c922f104934570c49e11ac887cca908cd40df32fa2db79c49c5dedfbd799`
`font_02_sfnt_off00009be6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9BE6	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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