Malicious PDF — malware analysis report

Static analysis result for SHA-256 1710dd4df7720718…

MALICIOUS

PDF

61.4 KB Created: 2020-08-12 14:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cab48f3cc66e24bf3b9a7ab15da3d74f SHA-1: 2677a1f779aa66fee2986760f191fb28760c16e6 SHA-256: 1710dd4df77207188f4ee02f340b417905d02fa98e7a7710af0584b97ff50545
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many pointing to Shopify, indicates a link farm or SEO poisoning attempt to distribute malicious content.

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.cc/pify?keyword=the+cambridge+history+of+the+american+novel+pdf
    • http://noporevo.northernfitness.net/uploads/1/3/1/4/131437423/5460077.pdf
    • http://files.18crossroad.net/uploads/1/3/0/7/130740316/fifidimovuxetow_nezupevotedad.pdf
    • http://jojuv.jasonrinehart.com/uploads/1/3/0/7/130739919/bodedu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3846/4405/files/gst_payment_voucher_format.pdf
    • https://cdn.shopify.com/s/files/1/0439/7809/6798/files/2016_chevy_cruze_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0450/2175/7590/files/5519312345.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/redukobefojunefofarika.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8138/files/python_pandoc_docx_to.pdf
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/39025673194.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1295/files/sales_manager_duties.pdf
    • https://cdn.shopify.com/s/files/1/0440/1076/6486/files/37857050216.pdf
    • https://cdn.shopify.com/s/files/1/0431/3913/7702/files/56985407634.pdf
    • https://cdn.shopify.com/s/files/1/0432/6440/9764/files/33180091241.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1265/files/61899474555.pdf
    • https://cdn.shopify.com/s/files/1/0437/0314/0506/files/xusaxinizalama.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/bewogilugekejepelasudo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5177/8202/files/94675097612.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_off0000b0e6.bin
becc39fef8aa3652a3ef1e2af9980c3712fd0189871e815b958ea73a4dcc121a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E6 5820 bytes
font_01_sfnt_off0000c492.bin
e2bc4ad26b93731a311f2bed00b908cf68a8bbb018c5b3e868bfc7432e720bc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC492 10424 bytes

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