Malicious PDF — malware analysis report

Static analysis result for SHA-256 a874d8f268f7fcbb…

MALICIOUS

PDF

45.4 KB Created: 2020-08-16 23:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e54d6479bb2cb3df007f2e7ade5c659 SHA-1: 27631c1f46ff9ba5096e88430aafccda1d9c899f SHA-256: a874d8f268f7fcbbb63d25a731da6f043b226a21a1e68dc185a55e076231e120
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests the PDF is designed to lead users to malicious infrastructure, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=understanding+advanced+statistical+methods+westfall+pdf
    • http://zatow.helveticliving.com/uploads/1/3/0/7/130776322/268b6a7b685f0f.pdf
    • http://files.joshuakabbott.com/uploads/1/3/1/4/131453114/9925237.pdf
    • http://files.nerdy4nerdiness.net/uploads/1/3/0/9/130969424/6781104.pdf
    • http://patuxis.bsupolice.com/uploads/1/3/0/9/130969192/bac04683ad.pdf
    • http://files.honeyneverrots.com/uploads/1/3/2/6/132680860/zapaliwawasizajaba.pdf
    • https://cdn.shopify.com/s/files/1/0434/7294/5304/files/google_app_engine_console.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/69276255886.pdf
    • https://cdn.shopify.com/s/files/1/0433/4501/9045/files/dojijadolibudovisalovaxej.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3176/files/34689733113.pdf
    • https://cdn.shopify.com/s/files/1/0433/9020/6115/files/1771821148.pdf
    • https://cdn.shopify.com/s/files/1/0435/3854/6840/files/67659556515.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2343/files/navorovor.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/piwupokumimupuriramelaxef.pdf
    • https://cdn.shopify.com/s/files/1/0440/9550/4536/files/60477604233.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zonixalekena.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_off00007210.bin
76cf6b37e5685f348bde98a3e0c41c81c07cabe8d80f49ff185f1663057bdd30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7210 5712 bytes
font_01_sfnt_off0000856a.bin
68f2fde6ffc2845da2092e260a812c6851da925f163dcb2561ba03f8167188f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x856A 10296 bytes

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