Malicious PDF — malware analysis report

Static analysis result for SHA-256 21f780e13d9a9310…

MALICIOUS

PDF

51.3 KB Created: 2020-08-03 11:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42d6d204d9415c22da481bbde62839af SHA-1: 2c376cee92cba47855cb1021d2dc6f006f0e46e6 SHA-256: 21f780e13d9a93100237937b815610d975ebb8af01accfa27d183365ecb06136
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to Shopify-hosted PDFs, suggesting a link farm for SEO manipulation or to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. No scripts were extracted from this sample.

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=osu+angelsim+skin
    • http://voletebal.abaofillinois.org/uploads/1/3/1/4/131438464/dizij.pdf
    • http://files.marlonkellyloans.com/uploads/1/3/0/8/130874284/6965771.pdf
    • http://files.charlottehager.com/uploads/1/3/1/4/131453432/9cd2b68b7a2e6cb.pdf
    • http://files.monarchdebate.com/uploads/1/3/0/8/130813931/tuduj-sobakifaju-vuvobevu.pdf
    • http://files.ashleyknappenberger.com/uploads/1/3/1/6/131637316/wasaferotivelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2103/2859/files/jupetunik.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6482/files/dusokeworezedulade.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/kugozaguvagixedijijubef.pdf
    • https://cdn.shopify.com/s/files/1/0438/2323/5232/files/finuramefo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9776/8614/files/vanawoped.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/13897010054.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/ranavop.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2536/files/63129009137.pdf
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/35754232533.pdf
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/nexur.pdf
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/moresizeg.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/1/0432/6519/6197

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006206.bin
cbb52481ce94e16f1aa7c1e5556943e0858c32639ae52c58d7d3596933ba349e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6206 3016 bytes
font_01_sfnt_off00006cc2.bin
5a0f266a8c4ef33296df50d4533b7333ed41a1478b6ee5a3a6f7691b1edcd42e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC2 5000 bytes
font_02_sfnt_off00007dbb.bin
e5556457ba84be4530f643b14edc0514ee6e685593471a6434e7e893dbd881a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBB 13912 bytes
font_03_sfnt_off0000aa2e.bin
8b7fb3001780e52d9752b4a45056963f66659c4480726df879eeed3b7125700e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA2E 16192 bytes

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