Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6aab34bae5128e…

MALICIOUS

PDF

43.1 KB Created: 2020-07-14 04:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfce9ddb463dcc89b29df41c259c3bea SHA-1: d56786c126e8fa07ce201546bc0640b430924e81 SHA-256: ac6aab34bae5128eb1cbfedfe2c0dfdbc32f0fd4e1c21d64d11fcb5610d78ae2
150 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and appears to be generated content, likely a lure to entice users to click the malicious link.

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/wb?keyword=vocal%20nodul%20adalah%20pdf
    • http://files.hippiechickherbalharmony.com/uploads/1/3/0/7/130775352/3429570.pdf
    • http://files.oliverandchatfield.com/uploads/1/3/1/4/131453248/xemejipuzuk_kiwexudaxoxap_wepiru_zufezuroderu.pdf
    • http://files.ontmoetpalestina.nl/uploads/1/3/2/6/132695470/3958713.pdf
    • http://files.clarityautoglass.com/uploads/1/3/1/4/131453894/152156.pdf
    • http://files.clarityautoglass.com/uploads/1/3/1/4/131453894/15
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/51362234570.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/luparemeziset.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tiwimuz.pdf
    • https://tazesetinud.files.wordpress.com/2020/07/dejiloketesiduxoxikewo.pdf
    • https://gozadadud.files.wordpress.com/2020/07/59972444813.pdf
    • https://bamosuto.files.wordpress.com/2020/06/5775667884.pdf
    • https://xajilaxaluv.files.wordpress.com/2020/06/molixitukozeru.pdf
    • https://lamezogegora91309051.files.wordpress.com/2020/06/ponuwepowotibu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9839/9139/files/24084050198.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36283751979.pdf
    • https://cdn.shopify.com/s/files/1/0432/6840/7464/files/79687397812.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38935964995.pdf
    • https://cdn.shopify.com/s/files/1/0431/4664/1570/files/moxurokuzomisej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58657968950.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/nukubafufetopufigosaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/27316000247.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_off00006f69.bin
f03bde337fc6568305d0b7e05784e965172fb5a0947c85b49682150bf8877dfe
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F69 4568 bytes
font_01_sfnt_off00007ede.bin
5c2f0765b09b2809dce4c61d35b36d839fee7c322107c62a3d57439c11b8099c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDE 9412 bytes