Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3f19306cda781c…

MALICIOUS

PDF

37.9 KB Created: 2020-08-06 08:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac5db298ba329589817c90fcb94dbe89 SHA-1: 3cd731d893f75040552694e2f216983ca3718bae SHA-256: ce3f19306cda781c5ea1ba3f6e76149ec6e8d506ae5a90f1feb4865d2ffbd6b8
158 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded JavaScript and multiple links, one of which, https://ttraff.com/pify?keyword=advanced+itt+exam+questions+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'itt exam questions' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious verdict.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=advanced+itt+exam+questions+pdf
    • http://files.srfm.church/uploads/1/3/1/4/131437671/6bd109.pdf
    • http://files.kobanuniverse.net/uploads/1/3/1/4/131438268/pekezaxisodok_sujunasewowazud_fofumebonekawu.pdf
    • http://files.blueheronbookshop.com/uploads/1/3/1/4/131437005/muviz_rijamonuk_xakelodemusig.pdf
    • http://files.giacondaltd.com/uploads/1/3/1/3/131398489/3369555.pdf
    • https://cdn.shopify.com/s/files/1/0433/2814/3510/files/72041341750.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/vermeer_sc252_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/alfonso_reyes_libros.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/gejapuvenepenapew.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/51466998487.pdf
    • https://cdn.shopify.com/s/files/1/0432/2898/7547/files/85079926671.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/92918473933.pdf
    • https://cdn.shopify.com/s/files/1/0440/8557/5832/files/98531553147.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/50472257071.pdf
    • https://cdn.shopify.com/s/files/1/0432/2908/5859/files/1861416163.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056c3.bin
088e361ba6c4e6693f18fb8a2c92b787d0ef8fec06ddb535075e0bff964633d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56C3 5416 bytes
font_01_sfnt_off00006930.bin
90b6096fd7c634696a7e3b79a835fc23bcf1b16094d7347b99dc616b0b62b92e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6930 9952 bytes

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