Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace6fb888cf8eac2…

MALICIOUS

PDF

40.9 KB Created: 2020-08-06 11:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 987185a6820e3df58aaf5c4c2d361e4e SHA-1: 9dcf37067e1a67dba4334854f5fcab41bffb8a0b SHA-256: ace6fb888cf8eac261c70cf2cfa1c2093da7ab1d1e60f092ad4ba442851304df
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, a technique often used to redirect users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identified a link to a known malicious redirector, ttraff.cc. The PDF_SEO_LINK_FARM heuristic indicates a large number of external PDF links, suggesting a link farm designed to attract traffic. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this document.

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=benefits+of+bitter+leaf+pdf
    • http://files.odinbrotherhood.com/uploads/1/3/1/4/131438604/semuxuwetufawud.pdf
    • http://jozitopeg.i2cafe.com/uploads/1/3/1/6/131606346/numavikexikob-dipizukum.pdf
    • http://jemoz.totallytaggart.com/uploads/1/3/1/4/131453990/5335777.pdf
    • http://files.jeanbarrettpetphotography.com/uploads/1/3/1/3/131381681/nanep_sevixuxazem_degaluxulizot.pdf
    • https://cdn.shopify.com/s/files/1/0437/1972/1115/files/vazajumoxovokaderilol.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/sepokiwaxuvumomudeva.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/nudaluzob.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/sawerabufise.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/tapirazutogodeka.pdf
    • https://cdn.shopify.com/s/files/1/0430/5823/3493/files/al_quran_transliteration.pdf
    • https://cdn.shopify.com/s/files/1/0428/2669/4822/files/46991806748.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/biles.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/webatawo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8003629611.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/fuwuwiwovejebi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2476/0488/files/91778323987.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/88309931402.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_off0000628d.bin
4bff077f56a5b11847ba31ddcd4f8a7e668b3b17384e4a24f674d8fb5b2e8235
pdf-font-stream PDF embedded font (sfnt) at offset 0x628D 5224 bytes
font_01_sfnt_off0000745c.bin
7c172768fa2da5ffaf837b5a4e6a4033433b099f5530fc645af9d1071f3291ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x745C 10080 bytes