Malicious PDF — malware analysis report

Static analysis result for SHA-256 be24b34b78f3258d…

MALICIOUS

PDF

45.0 KB Created: 2020-07-25 07:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1a4078de2d6c31579e6cc474bfb0870 SHA-1: ecf9b7e06a32529740aafc31571b3c8c9a5b4098 SHA-256: be24b34b78f3258da4906c4a0862041664eee35988191c2cb2feb7d0b69f962f
128 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector service (ttraff.ru). This indicates a link farm designed to obscure the final destination and potentially distribute malicious content or phish users. The presence of a 'download button' lure further supports a malicious intent to trick the user into clicking a link.

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/wb?keyword=5.2.1.4%20packet%20tracer%20-%20configuring%20ssh%20instruction.pdf
    • http://files.imesclay.com/uploads/1/3/1/8/131856352/pozeter.pdf
    • http://files.infinite.vc/uploads/1/3/2/7/132710715/f21a8bc12137f70.pdf
    • http://files.4-ucorp.com/uploads/1/3/0/7/130739567/7385382.pdf
    • http://files.theglitterfromashes.com/uploads/1/3/2/6/132682976/novewuruvelikopo.pdf
    • http://files.colinblakepsychometrics.com/uploads/1/3/1/4/131409009/busasamowifap.pdf
    • http://files.theglitterfromashes.com/uploads/1/3/2/6/132682976/novewuruve
    • https://cdn.shopify.com/s/files/1/0431/5817/5893/files/78788383572.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/87241980087.pdf
    • https://cdn.shopify.com/s/files/1/0437/4013/5575/files/mevafetagetejavoruradu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tozonolemudafolafoxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2817/5255/files/78584733751.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/48560351385.pdf
    • https://cdn.shopify.com/s/files/1/0430/9362/2935/files/dobikanosi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/minunosutetu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9007/4005/files/nimokaxaze.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9405/files/70671474988.pdf
    • https://cdn.shopify.com/s/files/1/0431/0011/0999/files/ladigobajumebinuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/55817331565.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_off00006de5.bin
b7ec3a4e6d44d8c9fde55d66e696f0da16a45c4d1b3d842c45c8f4a1dac8b316
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE5 5696 bytes
font_01_sfnt_off0000814a.bin
22814c7c75e97ea4443943991dd955899d1f7a7d4f0ae721aa9efa2f1eddb5d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x814A 10808 bytes