Malicious PDF — malware analysis report

Static analysis result for SHA-256 7441030626ce4dc8…

MALICIOUS

PDF

40.3 KB Created: 2020-10-28 21:04:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4430fdae8cb7445078d75a24c3ef670b SHA-1: 1349a609c2d749104609a9b9f87d71aaeadf3519 SHA-256: 7441030626ce4dc822190827c53bad15cc8072835d3518d16d50ca235907767a
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body also contains the URL 'https://cctraff.ru/strik?keyword=alternative+breaks+ucsd', which is flagged as malicious. The presence of a large number of external PDF links suggests a link farm, often used for SEO poisoning or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://cctraff.ru/strik?keyword=alternative+breaks+ucsd
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f8bd44780205.pdf
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/83282a1.pdf
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/ximozoropetot.pdf
    • https://cdn-cms.f-static.net/uploads/4375886/normal_5f99ae73de6b7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/felasorarabipis/30265951062.pdf
    • https://s3.amazonaws.com/jifesu/alpert_valvular_heart_disease.pdf
    • https://cdn.shopify.com/s/files/1/0501/8697/7441/files/37750854777.pdf
    • https://cdn.shopify.com/s/files/1/0484/5489/3722/files/jinuvumilenijonupu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0799/0184/files/halloween_wallpaper_apps_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0483/6153/7689/files/rosetta_stone_pro_apk_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/15002454870.pdf
    • https://cdn.shopify.com/s/files/1/0483/2319/9140/files/geometric_probability_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0502/5061/2898/files/nevexazabodesunedo.pdf
    • https://cdn.shopify.com/s/files/1/0500/1229/1264/files/lic_policy_surrender_form_download.pdf
    • https://s3.amazonaws.com/jijumupade/89346221198.pdf
    • https://cdn.shopify.com/s/files/1/0502/9661/9193/files/nesofogidijiwo.pdf
    • https://s3.amazonaws.com/gezetega/univariate_and_bivariate_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0502/7853/1255/files/65491033875.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e4d.bin
265a55c394209482d236b82637d6e9053a155d8c739a9ad270e66b3b3b1fda12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4D 5184 bytes

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