Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa32d0611d82a72b…

MALICIOUS

PDF

64.2 KB Created: 2020-08-15 07:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f31816a813459a6488a1633b1d5c7ac SHA-1: 9a1ab215f6455a4260c6a3e3408f1275d9db1587 SHA-256: fa32d0611d82a72bdd809147708aac7461da21d2e8bb679decdc9ea313f8305f
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users with search engine optimized keywords. The document body, though heavily obfuscated, contains the same URL and keywords related to driving tests, suggesting a phishing or scam attempt. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking for malicious content.

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.cc/wb?keyword=nj%20driving%20test%20questions%20and%20answers%20pdf%20printable
    • http://kuxemiz.frocksunderground.com/uploads/1/3/2/7/132740606/mibofifuvidof.pdf
    • http://files.vertacc.com/uploads/1/3/1/6/131606844/9974012.pdf
    • http://kalawezet.studiobymeika.com/uploads/1/3/1/4/131453133/sesufuxefogu_bemudazogaloju.pdf
    • http://gowikof.ecospiritdesigns.com/uploads/1/3/1/3/131381679/guxexaxumewoma.pdf
    • https://cdn.shopify.com/s/files/1/0430/9545/7941/files/netaxesebuto.pdf
    • https://cdn.shopify.com/s/files/1/0436/9294/9658/files/kavenogifufusubibofas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/punctuation_worksheet_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/independent_contractor_pay_stub_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/5562/0006/files/92882624453.pdf
    • https://cdn.shopify.com/s/files/1/0435/9222/0840/files/fuvixuvatepopipej.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2637/files/zokulop.pdf
    • https://cdn.shopify.com/s/files/1/0448/6122/7169/files/lion_otter_beaver_retriever_test.pdf
    • https://cdn.shopify.com/s/files/1/0436/5071/1705/files/rumohra_adiantiformis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/15873242744.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/35623612302.pdf
    • https://cdn.shopify.com/s/files/1/0435/7170/8065/files/gakerixufuzuzepegowalum.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_off0000bb04.bin
8f2386708528a115733b3d83afc382e8d9b9f6bdd6e1e6b25b4289f3dc01af0e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB04 5672 bytes
font_01_sfnt_off0000ce74.bin
c999c8ec0cdf9a52e99932755ced4e0664275ff99893f3dab6fd014786b69098
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE74 10864 bytes