Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c7384073c67fe71…

MALICIOUS

PDF

55.9 KB Created: 2020-08-07 21:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3f4adbb54b9dc62f99286e6b0bd596b SHA-1: 65bbe4f0cd1b379c12e6b872442d29072e65e4cd SHA-256: 3c7384073c67fe71a7cc1a20b67ceeefac93b9c41a2ca2ec456cf2a71d5b68b6
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=ccie+sp+lab+workbook+pdf, suggesting a lure to download or access a "ccie sp lab workbook pdf".

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.cc/pify?keyword=ccie+sp+lab+workbook+pdf
    • http://files.cammcdonaldphoto.com/uploads/1/3/0/7/130775018/vuduk_nazikiwigo_loxedojepetux_wivolozegud.pdf
    • http://files.electpeterhaigis.com/uploads/1/3/0/7/130740148/bakekuwojela.pdf
    • http://files.totalmarinegippsland.com.au/uploads/1/3/1/4/131437599/zarozidafilaba_webim_gamusupefegu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0741/files/cadena_alimentaria.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/34429863940.pdf
    • https://cdn.shopify.com/s/files/1/0434/3676/9437/files/flippingbook_publisher_professional.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.pdf
    • https://cdn.shopify.com/s/files/1/0432/9239/3640/files/30786388761.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/12318231323.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2189/files/70105256443.pdf
    • https://cdn.shopify.com/s/files/1/0428/7476/5475/files/gixisixepiwekujozalokinu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/vafolibomorevilarazezego.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/5369756921.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4601/files/92214517084.pdf
    • https://cdn.shopify.com/s/files/1/0437/9826/6016/files/11699998630.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0561/files/.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_off000090f3.bin
7ee9a8dc4f7ef7f0815bfca372ea982be643333c73734d0c631a7ea73cd200bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90F3 5352 bytes
font_01_sfnt_off0000a344.bin
d79005f1672a2b65e16984b08ad87d0366ae90111a60c25a51ea3c30c02720ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA344 15336 bytes

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