Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e72466550c2f714…

MALICIOUS

PDF

41.0 KB Created: 2020-11-03 18:00:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d28e56e3a291b8ae25fa50e85d422c97 SHA-1: 7a01a592bdde1bb47dc8d5655fb1327334357b59 SHA-256: 7e72466550c2f714fb358f677f87efdb4611325ac80850734174155a54bd7c61
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL `https://cctraff.ru/strik?keyword=what+size+fuse+for+dryer` is the primary indicator of malicious intent. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=what+size+fuse+for+dryer
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/3585442.pdf
    • https://muzokive.weebly.com/uploads/1/3/4/4/134498707/1c16fc86a00.pdf
    • https://xurolimusogisuw.weebly.com/uploads/1/3/4/3/134395808/839b9d18d673.pdf
    • https://cdn-cms.f-static.net/uploads/4388424/normal_5f93fe7827b83.pdf
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/6354934.pdf
    • https://wimixexaselu.weebly.com/uploads/1/3/4/3/134324609/1307328.pdf
    • https://rogumine.weebly.com/uploads/1/3/4/4/134448770/0c8f6.pdf
    • https://fuvipizewovotat.weebly.com/uploads/1/3/1/0/131069886/dolizu-lopumozezabajij-dunabobegal-lapado.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rotafasaniz/east_point_academy_calendar.pdf
    • https://s3.amazonaws.com/vobuturinivi/list_of_proper_nouns.pdf
    • https://s3.amazonaws.com/zasepo/solicitud_de_trabajo_walmart_en_espaol.pdf
    • https://s3.amazonaws.com/jagux/safety_professionals_reference_and_study_guide_third_edition.pdf
    • https://s3.amazonaws.com/dazifozixawus/sozug.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006310.bin
4173a192ff76fa59c0794735b4dd8cf6f7f26fca93bccf4e9b697f3c4025b170		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6310 5128 bytes
font_01_sfnt_off0000749a.bin
989528a1a6d7aa4fb2bbc6097ef451e220299cac6251282d76aade62a9b709a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x749A 10144 bytes

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