Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b8f5cf84b1a574e…

MALICIOUS

PDF

128.0 KB Created: 2020-08-29 02:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 736bb8e06c5b58a2b3b03a2808922e40 SHA-1: de01831e12dd4690589024836122418d4dd264e6 SHA-256: 6b8f5cf84b1a574e4c07b9491500ad238d5dfa58df2a7e501940381bb856e99b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one prominently pointing to 'ttraff.com', identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a 'Yamaha zuma 50 owners manual', which is likely a lure. The presence of numerous Shopify links, while many are benign, suggests a link farm for SEO manipulation or to obscure the malicious redirector. No scripts were extracted, but the PDF structure and malicious link indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=yamaha+zuma+50+owners+manual
    • http:///www.safercar.gov
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/set_theory_definitions.pdf
    • https://cdn.shopify.com/s/files/1/0433/2093/4558/files/37204713778.pdf
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/platform_heels_shoes_uk.pdf
    • https://cdn.shopify.com/s/files/1/0430/8310/4409/files/xinofokutujobe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1185/files/free_hand_lettering_alphabet_practice_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/0886/8008/files/fuzaranajiwox.pdf
    • https://cdn.shopify.com/s/files/1/0431/8039/2609/files/azure_cloud_computing.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1f77c90893a4412aaa3473ad3b14f38.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3af5c0010434d28bc4af6c163e6b6a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a888254db0e487a9d5dedefc3f79604.pdf
    • https://static.usrfiles.com/ugd/b8c837_8df74262b403471d8adc9018a728f5bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b569ee11d2e4fa09dd267c09b206627.pdf
    • https://cdn.shopify.com/s/files/1/0434/5679/0681/files/10_uses_of_computer_in_agriculture.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/63233646185.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019a4d.bin
8f735d87f476c01e2e6e854931520535865421b002979807607fdc1a7ff93b61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19A4D 5296 bytes
font_01_sfnt_off0001ac41.bin
31c211ec121e5ece595f66a10428a1934bbe5371be7554e2206cc9cdfc9a368e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC41 16040 bytes
font_02_sfnt_off0001ddf6.bin
2f70223f17dcf1f6480fec686df0135acd461b25747c6c0a456e74d6e5033278		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DDF6 16100 bytes

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