Malicious PDF — malware analysis report

Static analysis result for SHA-256 290f70829212310a…

MALICIOUS

PDF

36.9 KB Created: 2020-09-10 03:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c276386a1155e78a71201031654c4c24 SHA-1: 546c5c99b0fbb3dedcec940870d6a6af9ad9180a SHA-256: 290f70829212310ae38acbd7acc7b954be873220820f7193b6d10cdaedfc5c4a
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many of which point to domains associated with link farms and redirectors. The primary malicious URL, 'https://ttraff.me/wix?keyword=adverbs+worksheet+for+2nd+grade', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and appears to be a lure for an educational worksheet, suggesting a social engineering tactic to drive traffic to malicious infrastructure.

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.me/wix?keyword=adverbs+worksheet+for+2nd+grade
    • http://boguduva.actionsportsracing.com/uploads/1/3/0/7/130738847/a2ae72.pdf
    • http://lepeporo.urbanedenbeauty.co.uk/uploads/1/3/1/4/131413418/5711969.pdf
    • https://cdn.shopify.com/s/files/1/0434/6835/7796/files/bleacher_report_fantasy_mock_draft_nfl.pdf
    • https://cdn.shopify.com/s/files/1/0428/1886/3260/files/crystal_reports_runtime_64_bit_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/tough_questions_to_answer_funny.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1960/files/95582389039.pdf
    • https://cdn.shopify.com/s/files/1/0437/1048/0533/files/chevrolet_trax_ls_manual_2014.pdf
    • https://cdn.shopify.com/s/files/1/0432/1368/4891/files/damusinudorabok.pdf
    • https://cdn.shopify.com/s/files/1/0433/4125/0714/files/business_casualty_loss_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/94812109240.pdf
    • https://cdn.shopify.com/s/files/1/0435/4139/7656/files/collections_framework_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/bed_cet_question_paper_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5208/9000/files/51443957523.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_off00005209.bin
cda78950cc3508319dc24d76bd39d8fef1828aa35d0f0bf8180fcc7ad4c6c54b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5209 5616 bytes
font_01_sfnt_off0000653f.bin
d1a4447633da7b92c468983250d4b98438b98fb079421da4154d7180b997bc4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653F 9892 bytes

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