PDF malware analysis — malicious · a25a3352641c968e

MALICIOUS

PDF

48.5 KB Created: 2020-10-27 05:15:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 5da0dc938ffda0d028cba57165c2a799 SHA-1: 2a2837615c27c93d2a0570a81670534c031c9d46 SHA-256: a25a3352641c968e6c763453a452745e5acffb99d3ce035f3cc8bab48c359153

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://gettraff.ru/strik?keyword=mp45+free+download+pdf`. Another heuristic indicates a browser extension installation lure, suggesting a social-engineering tactic to trick users into executing malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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=mp45+free+download+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4376611/normal_5f8a275f5e30b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367961/normal_5f8aa0c618261.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386086/normal_5f8f7694605f5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381551/normal_5f91e6ea1bc7e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380881/normal_5f96a151eebb4.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.opentle.orgIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/0462/4548/files/ghatna_chakra_geography_in_english.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/4857/8471/files/90807103036.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/5850/3573/files/65720307.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/7477/5957/files/xulikikajarufarowigag.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0476/7806/2758/files/swot_analysis_download.pdfIn PDF document text
- https://s3.amazonaws.com/zidosozawok/hindu_calendar_2020_with_tithi_in_hindi.pdfIn PDF document text
- https://s3.amazonaws.com/pewebopufupe/99993220219.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b864250a-40fc-405a-ab67-c2026c5a0c72/3894306959.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e51d94bf-aa97-4f51-945d-5a573e34c073/zetugunewefon.pdfIn PDF document text
- https://s3.amazonaws.com/bevekizadoxuj/nationalism_in_india_class_10_notes_download.pdfIn PDF document text
- https://s3.amazonaws.com/tigovatolis/thyrite_type_lightning_arrester.pdfIn PDF document text
- https://s3.amazonaws.com/jezaxojipevu/adobe_full_version_apk.pdfIn PDF document text
- https://s3.amazonaws.com/fejififimaketo/html_tags_list_with_examples_and_description.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/2251/5865/files/dynasty_episode_guide_1981.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0266/9828/5230/files/58983305274.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0488/0472/4901/files/tien_and_chiaotzu_dokkan_summon.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
- http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000068f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x68F8	5164 bytes
SHA-256: `8ef59abb02d2346f92bebc0853ec4c7ca586ed68c6532421ce6abbb9c136cf0f`
`font_01_sfnt_off00007ab5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7AB5	7872 bytes
SHA-256: `359412c92dac40c6017d8603b2e424196c6a2cbec67945c77ee3430759e2463f`
`font_02_sfnt_off00009079.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9079	10536 bytes
SHA-256: `812ba41f01c1d7955c915d776037db8e9db61499fa8f6df55b023d0efb16b4ae`

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