Malicious PDF — malware analysis report

Static analysis result for SHA-256 b858ecf6a18fcab9…

MALICIOUS

PDF

41.2 KB Created: 2020-08-18 15:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32bb691fb024b965947b14db666eee8e SHA-1: 903b172b237ed169bc795ed51a8d1f042a3245c7 SHA-256: b858ecf6a18fcab9ea144dc83ef1b3529d8426cd7939d13052aa2571300d971d
128 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body text, though heavily obfuscated, contains a URL that appears to be a lure for a 'daily planner template'. The presence of a 'download button' heuristic further supports the social engineering aspect. The primary malicious link identified is https://ttraff.ru/pify?keyword=daily+planner+template+free+printable, which redirects to other content.

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=daily+planner+template+free+printable
    • http://files.sandraclarke.ca/uploads/1/3/0/7/130776823/pirajox.pdf
    • https://cdn.shopify.com/s/files/1/0438/1261/8402/files/witanilug.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/52664238753.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/mivomeribok.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0486/files/43907748966.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/74530032809.pdf
    • https://cdn.shopify.com/s/files/1/0439/7367/3118/files/dutigikigezibi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/6482732242.pdf
    • https://cdn.shopify.com/s/files/1/0430/1094/9273/files/57371086533.pdf
    • https://cdn.shopify.com/s/files/1/0432/2040/2343/files/tukinamamo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4267/5608/files/sumorasegojel.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_off000064de.bin
f60c5e96e5420a5d9c6920026caea22ef970efdbfbba9dfb15c1077e27b1f266		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DE 5112 bytes
font_01_sfnt_off00007630.bin
3311e77e3316c7ea10cd1d233e83a01659cb57b37b56ee15cd9dc92a94d82031		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7630 10028 bytes

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