Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e400ca497da276e…

MALICIOUS

PDF

42.3 KB Created: 2020-08-09 00:37:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcbc1883cf8d9f3cb14a7436175b06f4 SHA-1: 4af061953d8c80282728c040c927d62ad9ee7100 SHA-256: 8e400ca497da276ea1a8cc7d5cbd6611b6c992a69570073d67c5459bb21ab457
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.ru', which is flagged as malicious. It also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=upsc+model+answer+sheet+pdf
    • http://files.louthbeekeeping.com/uploads/1/3/0/7/130739625/49f83.pdf
    • http://files.annalisalosangeles.com/uploads/1/3/1/0/131070591/wijemepo.pdf
    • http://xewat.iironaekki.com/uploads/1/3/1/0/131070450/3745994.pdf
    • http://files.ahavabotanicals.com/uploads/1/3/0/7/130740148/luzevafad.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/fevotadazakag.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/57391961349.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/98239219204.pdf
    • https://cdn.shopify.com/s/files/1/0431/4192/2982/files/debujavodefopa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/dorosotiduzuzizonar.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/nipumu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9155/8551/files/83263684538.pdf
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/27753638571.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/92820542066.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/bigasuka.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2244/files/maytag_mhw5500fw_consumer_reports.pdf
    • https://cdn.shopify.com/s/files/1/0434/2244/9820/files/22831571664.pdf
    • https://cdn.shopify.com/s/files/1/0430/5593/9733/files/9408937175.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53295895336.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/
    • https://cdn.shopify.com/s/files/1/0430/5593/9733/f

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005963.bin
b16a51e899ed75677daa982841056d883fc75bdb0ddd5353cc18b054a462916a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5963 5220 bytes
font_01_sfnt_off00006af7.bin
64123bbeef076243cea21962efe36f996a92ad4321dd5903702f47ef93481fef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF7 10212 bytes
font_02_sfnt_off00008daf.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAF 4324 bytes

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