Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3c67cade40f10a…

MALICIOUS

PDF

42.8 KB Created: 2020-07-19 14:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ec7a1c393660752fb159bd446d01171 SHA-1: 158554ff8abcd0b1c010c398d1dea475d1845dd9 SHA-256: bc3c67cade40f10ae629cc9c28b52aa738acb847402f9ffd50d193c56a18b318
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/wb?keyword=recycling%20worksheets%20pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious link is sufficient to determine the attack pattern.

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.
  • 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://ttraff.com/wb?keyword=recycling%20worksheets%20pdf
    • http://files.moniquesartjewelry.com/uploads/1/3/1/6/131606550/8519566.pdf
    • http://files.unbrokenchainart.com/uploads/1/3/1/0/131070688/8b947efbc74b1.pdf
    • http://files.cinnamontology.com/uploads/1/3/0/7/130739726/6028682.pdf
    • http://files.motivationbymaia.com/uploads/1/3/2/8/132814593/kotovam.pdf
    • https://zavowuboruk.files.wordpress.com/2020/06/buvig.pdf
    • https://zogojad.files.wordpress.com/2020/07/muvobipur.pdf
    • https://pavugozubilo.files.wordpress.com/2020/07/53242963624.pdf
    • https://kitiwuxe.files.wordpress.com/2020/06/17192759726.pdf
    • https://metazak.files.wordpress.com/2020/06/15334723785.pdf
    • https://toxagam.files.wordpress.com/2020/06/78323333287.pdf
    • https://pudagul.files.wordpress.com/2020/06/tewir.pdf
    • https://fukagutezi.files.wordpress.com/2020/07/tuletoxiv.pdf
    • https://begaxanup969609704.files.wordpress.com/2020/06/nogirodusimotivudige.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1122/files/42661490634.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekugoxozeritazol.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/2543157254.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/68082125837.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/mowijoxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/jijodivanupezexalebusegap.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0064/files/38746447131.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/suwugozetifamikomowi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/73746762654.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006188.bin
3e5fafef14105ca84298833e1e846f163976fb9a82d7b5361b16fda20ff21b5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6188 5260 bytes
font_01_sfnt_off0000737f.bin
f0fb4da6f5adcaed855d137bf48717d46268c515bf0a37d399aa2dbf4ef0e30d
pdf-font-stream PDF embedded font (sfnt) at offset 0x737F 13504 bytes