Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a773cc9a904784…

MALICIOUS

PDF

33.3 KB Created: 2020-08-21 14:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6b4d66421c26e7582d0c9bf132e93f0 SHA-1: cde8af1463f1c551d9cf0604b40d3679e230c6ab SHA-256: 42a773cc9a90478461206ad1f8f6abf614e1f293d39493d722eebe135b939562
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL found in the heuristics. This suggests the PDF is designed to lure users into clicking malicious links, likely as part of a phishing or scam campaign.

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=nz+curriculum+planning+templates
    • http://files.lisamaki.blog/uploads/1/3/2/8/132814306/soxejanikameru_fuzukujamun.pdf
    • http://files.cuttingedgewealthadvisors.com/uploads/1/3/1/3/131379111/81de41d89d52.pdf
    • https://cdn.shopify.com/s/files/1/0428/9586/8057/files/zeworodulobogelitow.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/kinufeba.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0605/files/dog_wash_n_go.pdf
    • https://cdn.shopify.com/s/files/1/0436/9560/3862/files/92208074147.pdf
    • https://cdn.shopify.com/s/files/1/0435/7816/3359/files/critical_thinking_worksheets_for_1st_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/33736316564.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasamonuje.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/64523805151.pdf
    • https://cdn.shopify.com/s/files/1/0431/0168/3865/files/72784480047.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/job_appointment_letter_for_new_employee.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_off000044f3.bin
6edadb51b5d3e58738ee8bfab0d5f34c534326a1f818a550aff92283af900e04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44F3 5272 bytes
font_01_sfnt_off000056d6.bin
cb89e70b552b9431db911adc135e5abad2f588d29e049a5f65b45b467856dd55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56D6 9944 bytes

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