Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b5f7df1fa269aa…

MALICIOUS

PDF

52.7 KB Created: 2020-07-30 02:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7490c0e0bab810936a2c08b682d4bc0a SHA-1: 5069bb41b34c47da9192be02772b0e2899d1bda3 SHA-256: 96b5f7df1fa269aa87467f852ec0aa2e3b869e0f7425f8eb5d750463979db4d7
120 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 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains strings related to PDF downloads and the authoring application 'wkhtmltopdf', suggesting a lure for users seeking specific content. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a phishing site or malware download.

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.cc/pify?keyword=asymptote+pdf+download
    • http://files.booksfoodtravel.com/uploads/1/3/1/0/131069968/2a0ef6266a5.pdf
    • http://files.biancasaurusbites.com/uploads/1/3/0/7/130739780/e76ad3.pdf
    • http://files.rsdliteracytools.com/uploads/1/3/0/7/130739782/rabejiba-makufi.pdf
    • http://files.kidsklosetnc.com/uploads/1/3/0/7/130776346/14ed29760.pdf
    • http://files.kidsklosetnc.com/uploads/1/3/0/7/1307
    • https://cdn.shopify.com/s/files/1/0436/0686/8131/files/60694964529.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/61262278867.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/1880963162.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/10301790468.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/38484642396.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3471/files/85553929607.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sakumuxapiwitisozu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5649/5783/files/mimowesatus.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/vegamizezigiwukerade.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/5318529939.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_off0000907b.bin
861626b88be6a538625c115c696be9ec8de74e537cc33d56bd2b188e453ca4fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x907B 5016 bytes
font_01_sfnt_off0000a191.bin
c68ad506f4d12c0872f9f2f3d44802d81db6d25a9ed54836a15c6f6e3041046f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA191 10636 bytes

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