Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f8496e08293abe…

MALICIOUS

PDF

36.8 KB Created: 2020-07-09 10:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8599ec01340194cc02e401773d210ddb SHA-1: 1e740753179bc4b6b25dfa646e88a7dc9986ab51 SHA-256: 65f8496e08293abee7141843be7cca9e32be36564261edc69c5047a44feba6e7
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are structured as SEO link farms. One prominent link redirects to 'ttraff.com', a known malicious redirector. The document body, though partially corrupted, contains the same URLs, suggesting an attempt to drive traffic to potentially malicious or deceptive content. No scripts were extracted, but the PDF structure itself facilitates the attack.

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/wb?keyword=roland%20tr8%20manual
    • http://files.morethansoulfood.net/uploads/1/3/2/3/132302973/timuf.pdf
    • http://files.erinboake.com/uploads/1/3/0/7/130776718/maxul_zefanenumu_ruxuxotevar_jazomagudigem.pdf
    • http://files.asliagirbas.com/uploads/1/3/0/7/130776841/07f27bfa0f9527.pdf
    • http://files.paiboon.biz/uploads/1/3/1/4/131406762/1208977.pdf
    • http://files.thedottedpig.com/uploads/1/3/2/7/132712251/f5a73.pdf
    • http://files.surrenderedtochrist.org/uploads/1/3/2/6/132681656/wulegi.pdf
    • http://files.oaklandyardtournaments.com/uploads/1/3/0/9/130969300/3815936.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://likoruki.files.wordpress.com/2020/06/tebowigup.pdf
    • https://kezinoniwet.files.wordpress.com/2020/06/lirebegareli.pdf
    • https://lixakukebup.files.wordpress.com/2020/06/nulixurosotuxadupa.pdf
    • https://rogofuxeviso.files.wordpress.com/2020/06/57177075978.pdf
    • https://jovemubam.files.wordpress.com/2020/06/negodi.pdf
    • https://lulaguledev.files.wordpress.com/2020/06/59175491165.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053e1.bin
a7cc44c9d6d279b6c213bbaeba86f54399658ad46f3d50392c9bd768f973234f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53E1 4708 bytes
font_01_sfnt_off000063b8.bin
df0a3ab83abff3606483f1e3a40a9967e78f8ce0377e7383e9da958e0fe15f2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B8 10232 bytes

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