Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6b1babb78bc8a3…

MALICIOUS

PDF

32.7 KB Created: 2020-08-12 06:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b40c0f5b41871f577622dc13934de29 SHA-1: cc43bf6aa82647c655fc16a341188752c428c3e2 SHA-256: 9e6b1babb78bc8a3d39fc32188d21451ffb7eb8540ff0d5ae494d78cce32a873
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though corrupted, appears to contain keywords related to educational worksheets, suggesting a lure to disguise the malicious intent. The primary malicious link identified is https://ttraff.com/wb?keyword=increasing%20and%20decreasing%20graphs%20worksheet, which is likely used to direct users to further malicious sites.

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/wb?keyword=increasing%20and%20decreasing%20graphs%20worksheet
    • http://files.whitefishbaygardenclub.com/uploads/1/3/1/4/131406075/mawazubunusotebi.pdf
    • http://files.paintedturtle.co/uploads/1/3/0/9/130970016/1785783.pdf
    • http://files.kelvinngmagic.com/uploads/1/3/0/9/130969080/jabotixodifuk-rulesarilut-mojutotojupiduk-nekevojide.pdf
    • http://files.musicianarchive.com/uploads/1/3/2/8/132816041/8137726.pdf
    • http://kupozuwes.organamusicgroup.com/uploads/1/3/1/3/131381489/zinijali.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/biophilic_and_bioclimatic_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7287/files/24625781436.pdf
    • https://cdn.shopify.com/s/files/1/0431/6525/3792/files/53693545031.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/statistics_definition.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/tomogekujiguvoxemu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4516/5975/files/modals_of_future_possibility_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0439/0954/6136/files/fitexabugabosatenetume.pdf
    • https://cdn.shopify.com/s/files/1/0429/3630/3782/files/68521478239.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/tetegodewiwokibuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/4003/9324/files/figamepisaguvapeji.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/chawla_composite_materials.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/gizinefibarujapigipibofa.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_off000044a3.bin
fc1bf92b82b2fa6715a7060871bbaa4c525cdcbf8b1080c336da1544d743b70b
pdf-font-stream PDF embedded font (sfnt) at offset 0x44A3 5396 bytes
font_01_sfnt_off000056fe.bin
733e1b6dfd3df6f4a2d8934e1d8147b1f21ae097ffdf0d0a0e21fe7b57e29708
pdf-font-stream PDF embedded font (sfnt) at offset 0x56FE 9120 bytes