Malicious PDF — malware analysis report

Static analysis result for SHA-256 23dcbd881aa8f811…

MALICIOUS

PDF

56.5 KB Created: 2020-08-24 01:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cfbae894d2360c3c9e97942a43137a5 SHA-1: 8a70f33b0b228e5d937709ea54765889ae93ab45 SHA-256: 23dcbd881aa8f811de04af75ff7dc3b0752d01cb1c0fcfe7c9203270aa8876de
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for phishing or malware distribution. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=non+stop+air+supply+songs'. Another heuristic flagged the document as a link farm, with many links pointing to Shopify domains, suggesting an attempt to obscure the true malicious intent. The document body, though heavily obfuscated, contains the malicious URL and a reference to 'wkhtmltopdf', indicating it was likely generated by a tool for creating PDFs from web content, possibly to disguise malicious links.

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=non+stop+air+supply+songs
    • http://files.surrenderedtochrist.org/uploads/1/3/2/6/132681656/wulegi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3867/7924/files/lupevujudixesobok.pdf
    • https://cdn.shopify.com/s/files/1/0436/0926/0190/files/binary_option_trading_plan.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/tikigejesota.pdf
    • https://cdn.shopify.com/s/files/1/0434/0970/3061/files/sampoorna_marathi_aarti_sangrah_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/1060/3677/files/sonowenigoveg.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/fevabagejugafunox.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/61366998797.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0813/files/administrao_financeira_gitman.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/50482365107.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_off00009c06.bin
d1097d78658eb0c77f304bf5fdd046a7f7103c1bb575b08b38e6219f2268874c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C06 5056 bytes
font_01_sfnt_off0000ad51.bin
f5886b4f5926f2e3b11fda3eedab3a0b061895451812716a50915eadccafb73d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD51 12492 bytes

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