Malicious PDF — malware analysis report

Static analysis result for SHA-256 955a344c5a491aff…

MALICIOUS

PDF

38.0 KB Created: 2020-10-27 01:09:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8614b2386125c9a21160c9dcd053d87d SHA-1: 9d55f0a155025453f00fc5a92db123987c4deb36 SHA-256: 955a344c5a491aff1201e2c254fb0b2a93c8e90faea3ee123eaad1028ddb9dcc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, identified as a link farm, pointing to various PDF files hosted on Weebly and other platforms. One of these links, https://gettraff.ru/strik?keyword=green+building+and+leed+core+concepts+guide+3rd+edition+pdf, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the redirector URL, suggesting its primary purpose is to drive traffic to these external resources.

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://gettraff.ru/strik?keyword=green+building+and+leed+core+concepts+guide+3rd+edition+pdf In PDF document text
    • https://motazejiwe.weebly.com/uploads/1/3/4/2/134266269/zoduxunikugoz-gudejilara-rewaz-tugupedora.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/rowitadari.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/3722212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404112/normal_5f93a93b1d047.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f8878cf20448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369343/normal_5f8a8a7196f48.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9304/1059/files/can_u_gain_muscle_without_protein.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2170/5631/files/father_of_asahd_3s_release_date.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5290/0260/files/livimowaruvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6262/3893/files/bitituvejigaxubizofanoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8576/7850/files/pokemon_heart_gold_emulator_ios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9186/0379/files/nijif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/mineplex_minecraft_server.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/2163/7064/files/zopewuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0708/6239/files/measurement_of_process_performance_should_focus_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e29af72-bad1-4ffb-ba89-074132943caa/ff14_mining_guide_60-70.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f70069-4339-4865-b89f-18e44cf92313/wonawod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37b09e06-07c9-436f-85c4-7242643bffb4/83057857301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453580e3-8d8c-46f2-996d-c00003a88b95/jozeridusixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7457bdbe-a004-421f-84ed-32109dfdda98/area_of_parallelogram_worksheet_grad.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.

FilenameKindSourceSize
font_00_sfnt_off00005241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5241 5656 bytes
SHA-256: 5d3da29eaa0ceb061e70d7afc44d7b23d54a89aeb1a26a2a45a3294f47fa34a7
font_01_sfnt_off0000658a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658A 10796 bytes
SHA-256: fad0c0bddfc703747e84f842a330a1e33446ef11ce87fc21f7262c068d435897

Open this report in the interactive analyzer, or submit your own file for analysis.