Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde13ab8921aac97…

MALICIOUS

PDF

52.6 KB Created: 2020-09-16 15:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01e7c3be8e185c181b180df28b55832c SHA-1: 1b9acf7dc6040814df0a295e2d3d4206e18afc7b SHA-256: cde13ab8921aac976231c2fdd0adcf966ae6cf2be94ecfc709376834113d0813
150 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a high number of embedded links, many of which point to external PDF files. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/wix?keyword=ai+ebihara+days'. The document body contains garbled text but also includes several URLs, reinforcing the link-based attack pattern.

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/wix?keyword=ai+ebihara+days
    • http://kefew.a2b2club.org/uploads/1/3/2/7/132710797/858296.pdf
    • http://mefaner.3blossomscafe.com/uploads/1/3/2/8/132814439/3079174.pdf
    • http://files.leeclarkzumpe.com/uploads/1/3/0/7/130775942/345173.pdf
    • http://files.bejewelled.shop/uploads/1/3/0/7/130775858/5544a8cb111694.pdf
    • http://files.thewestwoodcollection.com/uploads/1/3/2/3/132303009/2295871.pdf
    • http://files.smartfamilyhistory.com/uploads/1/3/1/1/131163841/bijabinujiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8829/8662/files/rimedio_contro_formiche_in_casa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/facts_about_animals.pdf
    • https://cdn.shopify.com/s/files/1/0434/5364/4966/files/michelin_guide_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1512/files/xevizatajufisaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/0260/0356/files/zonejaganobet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/30958701405.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8472/files/zixisajugipabo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/lawozorewes.pdf
    • https://cdn.shopify.com/s/files/1/0465/4674/7550/files/synonym_worksheet_grade_3.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c4a.bin
48d3071ba0a023d6aeedffb6032ade0a446a5680f91d60856ae6b79faceb7b27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4A 5832 bytes
font_01_sfnt_off00009090.bin
9946126faa597bb6567c989689679ec5aae825fddb5068a6a6672ec0c6f8dec7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9090 5112 bytes
font_02_sfnt_off0000a1e4.bin
d67d7c6beadc82755d683b1f8d4c06c11efd25003dcbe33e62f9d3d151b1379f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E4 10716 bytes

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