Malicious PDF — malware analysis report

Static analysis result for SHA-256 493dfa9e715cd941…

MALICIOUS

PDF

32.1 KB Created: 2020-08-09 05:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: caeeeef669c103ba3be6ec5d927da6b2 SHA-1: 92c0d274f92006177306cc85216398297fe0e8cb SHA-256: 493dfa9e715cd941644f2a50c2acef333389f6c4acaae61ac4079e78c420e395
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=political+economy+of+post+apartheid+south+africa+pdf'. This suggests the document is designed to redirect users to malicious sites under the guise of providing academic papers. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=political+economy+of+post+apartheid+south+africa+pdf In PDF document text
    • http://resul.threegracescoffee.com/uploads/1/3/1/3/131383544/9268540.pdfIn PDF document text
    • http://files.festivalrun.com/uploads/1/3/1/4/131409009/9144362.pdfIn PDF document text
    • http://files.dylanjmorgan.net/uploads/1/3/2/7/132712040/0328739bbe.pdfIn PDF document text
    • http://lukofivo.urbansoundstudio.com/uploads/1/3/1/4/131437402/de6806e96.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7230/6852/files/15748137812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/pitazolojudota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/matola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/lovazemuveliregisozukugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1321/6168/files/jinedosowamigigum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9801/3863/files/24871866463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2604/9182/files/sanojaluwumakosejubof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/chemistry_timberlake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3280/5527/files/58324089204.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004160.bin
63de35b78a2a60f388e0d93ed7de9e82735cdfdc26f8f01464cc9eb81ed9b145		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4160 5496 bytes
font_01_sfnt_off000053ee.bin
2f83a4c428939f7a4429b4a52bc0259ed98e69e7a2a078363e52ae08d95b2fcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53EE 9184 bytes

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