Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f7f29792126da72…

MALICIOUS

PDF

49.6 KB Created: 2020-09-01 04:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98ac91f9dbb84383bcc2d2a63c609a5b SHA-1: be4af39b0cce393b5998c9fbe3c26ec9057aac8b SHA-256: 4f7f29792126da722642b7722dcd746c5117c288f7ae74fab2c0b047a3c4101e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented to the user in the context of free handwriting worksheets, a common lure. The document also contains a large number of embedded links to Shopify, likely part of an SEO link farm to obscure the malicious redirector. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link within the PDF.

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/wix?keyword=free+handwriting+worksheets+queensland+cursive
    • https://cdn.shopify.com/s/files/1/0440/7925/1608/files/2096309541.pdf
    • https://cdn.shopify.com/s/files/1/0431/7852/4831/files/90664754525.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/24790114572.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/kikopivejoxasizax.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/84736191448.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/94797503665.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/gekeritoradutazadokuvig.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/surofuzukefudedelop.pdf
    • https://cdn.shopify.com/s/files/1/0434/7694/3000/files/afcat_2020_answer_key_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16711599054.pdf
    • https://cdn.shopify.com/s/files/1/0435/1724/7640/files/cibt_visa_online_order_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/positivism_approach_to_research.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2137/files/wedding_invitation_template_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0433/5806/0703/files/52945532061.pdf
    • https://cdn.shopify.com/s/files/1/0439/2887/9272/files/67853163038.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_off000082c5.bin
b3129c3f4c864647c9c28ba3168584bc8c85cb81cfbb4772edadd11a90d62e31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C5 5500 bytes
font_01_sfnt_off00009585.bin
914ec7a0bad12f99b7f7f179ed6351a48033a29d97b24b99fd044f21ac96188a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9585 10492 bytes

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