Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb182cede824039a…

MALICIOUS

PDF

45.5 KB Created: 2020-08-01 04:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aeb2a63f235fd4c36d7a3cfeddfb1f0a SHA-1: 858efac70a462de2c509e44ff6983189f74215d4 SHA-256: cb182cede824039a26587fe0d90d33984dd65f15a6ab6118a4a97071cf9ecda6
150 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 pointing to 'https://ttraff.com/pify?keyword=linux+system+administrator'. This URL is likely used to redirect the user to a malicious site. The PDF also contains a link farm heuristic, indicating a large number of outbound links, many of which are hosted on shopify.com. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the target URL.

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/pify?keyword=linux+system+administrator
    • http://files.theaustinfamilyreunion.com/uploads/1/3/0/7/130739740/01e3a7f193.pdf
    • http://files.susdlibraries.com/uploads/1/3/1/3/131381722/33dae37ef.pdf
    • http://files.hopewarmingpontiac.org/uploads/1/3/1/8/131857364/migiwubezofofor_rosej_zalikopunupiji.pdf
    • http://files.alabama-lera.com/uploads/1/3/1/1/131163684/48ff76b99167.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/gageliborufogobolimi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9728/files/pikodirowuzoti.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/susowufokuwagebetuji.pdf
    • https://cdn.shopify.com/s/files/1/0435/5119/5299/files/boxagikazonasunuvarene.pdf
    • https://cdn.shopify.com/s/files/1/0433/0999/0043/files/fixikutakebezotibekeful.pdf
    • https://cdn.shopify.com/s/files/1/0431/5545/6164/files/dokenidurotogib.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/zavex.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/betuxemenivere.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1792/files/ferengi_rules_of_acquisition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texojorigerusoxuduk.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/40601009965.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/1/0433/0999/0043/files/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006998.bin
2cebb4353b9229e661e3e7c22b5100a639d66052fc35c76b302609aee837b90e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6998 5048 bytes
font_01_sfnt_off00007aba.bin
e0f641e6e604c03efdf92a4a35f132ddba9bbb233fefb24462d20eed701500a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABA 14800 bytes

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