PDF malware analysis — malicious · bd5ced10400430cc

MALICIOUS

PDF

49.1 KB Created: 2020-10-27 09:56:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26

MD5: 947378a03e3b82f5c94ace642d428930 SHA-1: ea7f815e1d7b6df44273263d7239bf35b2f7d6ec SHA-256: bd5ced10400430cc7bc9912a99481931b56f7a9fc2b0e10b79ced5e0ed2cf6d7

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with 30 external PDF links, many pointing to S3 buckets and Shopify domains, likely to manipulate search engine results and lure victims. One of these links, https://cctraff.ru/strik?keyword=two+errors+in+attributions, is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and the malicious URL, suggesting an attempt to disguise its true purpose.

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://cctraff.ru/strik?keyword=two+errors+in+attributions In PDF document text
- https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/1d32287.pdfIn PDF document text
- https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/9f993c15988.pdfIn PDF document text
- https://vixeroniwemeful.weebly.com/uploads/1/3/0/7/130740086/1344528.pdfIn PDF document text
- https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/b606eb4667.pdfIn PDF document text
- https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/3030887.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/fojaxexino/48620141724.pdfIn PDF document text
- https://s3.amazonaws.com/bisegilupuf/support_vector_machine_kernel.pdfIn PDF document text
- https://s3.amazonaws.com/risisipajole/23962809889.pdfIn PDF document text
- https://s3.amazonaws.com/wilugugo/12398032241.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/9536/2209/files/3845208398.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0486/3161/1560/files/cours_trigonomtrie_2nde.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0460/7957/4180/files/holley_terminator_x_instructions.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0478/1791/6575/files/7223594527.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0485/9510/8000/files/69527102793.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b15fcdd7-fb96-4161-b92b-55978de0e4df/33344890863.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a4884efd-def4-4701-9f20-50ee40f20d92/the_intelligent_investor_first_editi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f50d30c1-e062-4ef3-bb1e-8fe7cbb45c21/32763544611.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ca88a5cf-0cff-454d-b655-7bcd374c77f4/sotejufiwawaxiperafubarab.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c2e29801-709d-48d6-85bc-eb41b25f8479/88975833459.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9a2ec9b7-3f68-41e3-bb82-d1e1d5fb791f/47532278779.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/6186/9214/files/gidajanakaji.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9737/5388/files/vetalanotule.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/3663/8369/files/what_is_pcm_carbon_equivalent.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/2239/2737/files/nadegezefufumanejanano.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0478/3567/6831/files/hangouts_latest_update_apk_download.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_off0000822f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x822F	4828 bytes
SHA-256: `5a71a5b1cd11b9039138dfa96bb594ee5031ed85e7524eec960f99a6a07d4340`
`font_01_sfnt_off000092bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x92BB	10584 bytes
SHA-256: `59a23ce8410d769b22ffbd43d0124f1e2816d152cf3974342475e2a1d5a9a812`

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