Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c5bca083c60ecd…

MALICIOUS

PDF

36.5 KB Created: 2020-08-21 00:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e00b4e765b51dae62678f58bb3da977 SHA-1: 5f5b37b271f22a31d736568e14260a1983fbaa93 SHA-256: 78c5bca083c60ecdc3cbfc55b21fe223b54161e3c031fcf51523b7750e9ca5c8
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.com/pify?keyword=twinkle+khanna+books+free`. This URL is embedded within the document body, suggesting a social engineering lure to trick users into clicking it. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious destination. The document body itself contains the malicious URL and a reference to 'twinkle khanna books free', reinforcing the lure.

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=twinkle+khanna+books+free
    • http://xalolokob.barbaralmatthews.co.uk/uploads/1/3/0/8/130813821/3353253.pdf
    • http://miret.plant4lifenursery.com/uploads/1/3/1/4/131453060/8330045.pdf
    • http://fosel.oldfilibuster.com/uploads/1/3/1/3/131381006/kepenoratigap_nozigifemoja_zaxidupisa_zefim.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/11166273800.pdf
    • https://cdn.shopify.com/s/files/1/0432/6948/8798/files/daxoza.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3813/files/benefits_of_livestock_farming.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/50631432935.pdf
    • https://cdn.shopify.com/s/files/1/0431/5512/8480/files/52613387963.pdf
    • https://cdn.shopify.com/s/files/1/0432/4740/3168/files/65761639646.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4741/files/93441510600.pdf
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/leriduwimazuvenuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/zibukewuvekosuto.pdf
    • https://cdn.shopify.com/s/files/1/0434/6865/2697/files/tapoxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0690/files/eenadu_epaper_kadapa.pdf
    • https://cdn.shopify.com/s/files/1/0440/1060/2661/files/zagejizawikuzavumozegoda.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/31997767566.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_off000052c4.bin
6e5d5bad8b8d16ac784543b8c086cac1734770b29dcf9a45a09a9c0217c2fe19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52C4 5100 bytes
font_01_sfnt_off00006424.bin
939830a1819eb425edffe3b6ef883fd5527e45bce381f9b7123701df01415f36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6424 9728 bytes

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