Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc36252bbd10810…

MALICIOUS

PDF

37.6 KB Created: 2020-08-25 07:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a69a358d6f953c0b60199c1ba045cf3b SHA-1: 5bb156f473fd33005d406b80b497db4dc7999ead SHA-256: dbc36252bbd10810ec9cc893b3ffff8976410c3725b248aae89eae2e3ebc1c1e
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also assigned a high probability of maliciousness. The document body contains the URL https://ttraff.com/pify?keyword=kalayil+dhinamum+song++kuttyweb, which is identified as a malicious redirector. The presence of numerous embedded links, including those hosted on Shopify and other domains, suggests an attempt to distribute malicious content or lead users to phishing sites.

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/pify?keyword=kalayil+dhinamum+song++kuttyweb
    • http://babekex.tommybarrettbroadcasting.com/uploads/1/3/1/4/131454012/2133414.pdf
    • http://files.hcl-informix-user.com/uploads/1/3/1/4/131411199/ede1a6b21276d.pdf
    • https://cdn.shopify.com/s/files/1/0438/4443/6128/files/33671519393.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/67433691979.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gibowutobarifokegibig.pdf
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/26514293504.pdf
    • https://cdn.shopify.com/s/files/1/0437/7185/5002/files/50614126151.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8626/files/consumer_buying_process_model.pdf
    • https://cdn.shopify.com/s/files/1/0451/1324/5848/files/jurnal_dampak_merokok.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/69211838509.pdf
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/authorization_letter_samples_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/romosan.pdf
    • https://cdn.shopify.com/s/files/1/0432/4527/3248/files/pofigevokovozifopesuboji.pdf
    • https://cdn.shopify.com/s/files/1/0437/9030/3393/files/android_emulator_for_windows_7_highly_compressed.pdf
    • https://cdn.shopify.com/s/files/1/0436/3842/3710/files/rigoredabubipatosuxevob.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000479f.bin
a3487fb6ba9a2c1696da6179ae71bd8ad9d3611daa0be070378fd726e7d04f3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x479F 5392 bytes
font_01_sfnt_off000059d7.bin
ad9d60b1745ebfe92867d9afd373b073ac758c920ecf68de8595d29e67c79575
pdf-font-stream PDF embedded font (sfnt) at offset 0x59D7 9832 bytes
font_02_sfnt_off00007b83.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B83 4324 bytes