Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d88bcc0855003f…

MALICIOUS

PDF

45.3 KB Created: 2020-08-10 10:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad282a233301e3803b2b55dea807428f SHA-1: cf318b5544ead1296da865c6fdd8af36eb617436 SHA-256: c6d88bcc0855003fd8c184e6eae2fc8a4905472aafb19ca9561f683aad498ea6
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely the primary malicious payload delivery mechanism. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the extensive link farm and the redirector URL are strong indicators of a malicious intent to drive traffic to harmful content.

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.cc/pify?keyword=cancer+de+piel+tratamiento+pdf
    • http://jidigo.manysizesfitall.com/uploads/1/3/1/8/131871871/zejevunitaz.pdf
    • http://files.clarinetrepairs.org/uploads/1/3/1/3/131383544/jevutogopere.pdf
    • http://files.supplydeskhavering.com/uploads/1/3/1/4/131453249/gudunarutosaxipob.pdf
    • http://files.neurology-u-tokyo.com/uploads/1/3/0/7/130775784/luluf.pdf
    • http://files.computerclubrhcc.com/uploads/1/3/1/4/131437276/8058813.pdf
    • https://cdn.shopify.com/s/files/1/0430/9522/8565/files/vudus.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/49082847464.pdf
    • https://cdn.shopify.com/s/files/1/0430/0813/1233/files/the_arduino_starter_guide_by_kunwar_imran.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/83783614395.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/21987551526.pdf
    • https://cdn.shopify.com/s/files/1/0440/6145/8597/files/45880937472.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/vifikafefafexumapu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3323/9457/files/autocad_file_converter_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/guwesimutetalajizobanubel.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/70485596435.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_off000072b8.bin
8fe42e5b535ed7d1b4fb03520cc1431ff0c9e976c2e16d7b3495cc5cdcf4c93b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B8 5028 bytes
font_01_sfnt_off000083bf.bin
2f0bb78f6ffcbade9b5f95962c6f8802dafecfef61192115e0376f856faa0224		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83BF 10712 bytes

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