Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d992e173dc534d…

MALICIOUS

PDF

51.4 KB Created: 2020-08-09 17:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63200ae53fe90e005a9f5916e68c0315 SHA-1: 589dfc4a219539aae707b29d25a3dc84335cb5dc SHA-256: f5d992e173dc534d377c62639f27db67560167fe3c5cfa329e5148bb0e6ab918
120 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, specifically 'https://ttraff.cc/pify?keyword=5th+grade+math+placement+test+pdf'. This URL is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to a '5th grade math placement test', suggesting a social engineering lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm or distribution mechanism. The primary attack vector appears to be directing users to the malicious redirector.

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=5th+grade+math+placement+test+pdf
    • http://files.jerrianns.com/uploads/1/3/0/8/130874398/2c184f434.pdf
    • http://files.doublefeaturepreachers.com/uploads/1/3/1/4/131438323/1551742.pdf
    • http://files.lasalledumoulinneuf.com/uploads/1/3/1/4/131454916/0ae5cbefcff1730.pdf
    • http://files.mcbridefloresteam.com/uploads/1/3/0/7/130740438/dirigusute.pdf
    • https://cdn.shopify.com/s/files/1/0434/0629/5201/files/92165807824.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/pumekaridinojuzeropipunar.pdf
    • https://cdn.shopify.com/s/files/1/0440/2626/5765/files/9756529848.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3132/files/50649779908.pdf
    • https://cdn.shopify.com/s/files/1/0435/2406/3392/files/42883216672.pdf
    • https://cdn.shopify.com/s/files/1/0436/7345/2697/files/2003_ford_focus_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6671/9385/files/binary_search_ruby.pdf
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/helping_verb_worksheets_7th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0992/files/13106299723.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62114329075.pdf
    • https://cdn.shopify.com/s/files/1/0437/3607/2341/files/26809240758.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_off0000818e.bin
2339f42f1fad0919d03f4e5b0caffb9281d3e81c5b1246a17f39bf1db0e54cf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x818E 5596 bytes
font_01_sfnt_off0000946d.bin
7e2f55586df1969f9139a43c92acab4c794a04bffc5f402161bd0d3b8badda0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x946D 14260 bytes

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