Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68c5d95e0a61fe8…

MALICIOUS

PDF

64.6 KB Created: 2020-08-14 19:23:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 689f3f66be675b77fca221fa3e765eb5 SHA-1: 6dde7a8b1e99c6f868834904addac11f0e0eb168 SHA-256: e68c5d95e0a61fe85078f85c41273967484f0dd94054f2d59074254403a8a8bd
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains references to 'Cengagebrain quiz answers' and the malicious URL itself, suggesting a phishing or scam lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious redirector. No scripts were extracted from this sample.

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/pify?keyword=cengagebrain+quiz+answers
    • http://pexode.combscriminaldefense.com/uploads/1/3/1/3/131380480/6014256.pdf
    • https://cdn.shopify.com/s/files/1/0436/4868/0089/files/pdf_to_word_converter_nitro_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/filimixurofutawig.pdf
    • https://cdn.shopify.com/s/files/1/0433/1477/4169/files/48887693474.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1865/files/chaining_day_j_cole.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/produo_de_anticorpos.pdf
    • https://cdn.shopify.com/s/files/1/0434/2392/4376/files/92003909152.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/zolodawisefuzujowelipuwo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/kyocera_cutting_tools_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/bmw_dashboard_warning_lights_chart.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073c0.bin
b16c0835e98f4a14bb55aca7841ae5683b018ee58383f539c2e8d616e1e748d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C0 8888 bytes
font_01_sfnt_off0000913a.bin
77e3f34401e4318256415adfbc9c25b2a942f918374021f4654fe5debfa90f54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x913A 5132 bytes
font_02_sfnt_off0000a2d1.bin
69389ef689f8c86eac0e000972d65951e510e04873d32f756dcde3f6d35d2ff0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2D1 2108 bytes
font_03_sfnt_off0000ac7b.bin
e953202d8fa9dac23b81cd91a430162c828ec4345442bfe12025d91b075d8d5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC7B 16084 bytes
font_04_sfnt_off0000de11.bin
2e0c258850aa8ea0839305467b18bf2a800c45f1d5da52dd3fc64ac940644fc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE11 16840 bytes

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