Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4436a85147ba468…

MALICIOUS

PDF

33.6 KB Created: 2020-10-04 13:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cc01e10266746fcf58197fef93d2cfa1 SHA-1: 0ecd816fed305d0271eceacc06bd93ec275943b3 SHA-256: e4436a85147ba468d8831b13955d3970e5543bc0102f47b66a7bd30c22dd39bf
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text related to balancing equations and a URL that matches the malicious redirector. This suggests the document is designed to trick users into visiting malicious infrastructure, likely for phishing or scam purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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.
  • 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=balanceo+de+ecuaciones+metodo+algebraico+online In PDF document text
    • https://site-1036885.mozfiles.com/files/1036885/mimawurodetiwapagosedid.pdfIn PDF document text
    • https://site-1037018.mozfiles.com/files/1037018/gaviziwirebos.pdfIn PDF document text
    • https://site-1036926.mozfiles.com/files/1036926/40217404000.pdfIn PDF document text
    • https://site-1038792.mozfiles.com/files/1038792/bomadubiwuji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e045321a-2614-4cb5-96dc-841ed4c7124f/65428321816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a53bc8e-6230-4a98-b69f-a3982137aa56/lajonesirujoxarivanozox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7c5f51d-bab8-4bc8-a221-43267cb795e2/81922352422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/621e2bb0-a28f-4421-bce8-ab0ed9b5291a/vokagixomoluparesik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a4891f-f481-4295-a612-1d8b52a92bb1/fapelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5255/1329/files/amazon_video_app_android_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7996/3302/files/black_sports_and_entertainment_hall_of_fame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6274/6517/files/woman_at_point_zero_full.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/5981909917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4692/0615/files/26326510683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8545/8325/files/what_is_the_overload_principle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7046/6464/files/eagle_court_of_honor_ceremony_ideas.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6467 5448 bytes
SHA-256: 567be52f9e433ae5988a47d250fea88c1610481eab862799a43793522cf17e7d