Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fe3bae7b9c83c4…

MALICIOUS

PDF

45.1 KB Created: 2020-08-24 22:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b24c41bd32f22a2fb7a518eb195c259f SHA-1: 6f9424d202526448183fe274ed2780e1eec33fbd SHA-256: c6fe3bae7b9c83c4dcd345f6d83d2cef3d89723406fedb895733c1c8fec4be2f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.com/pify?keyword=sunflower+violin+sheet+music+easy', is designed to redirect users. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a lure to disguise the malicious intent. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=sunflower+violin+sheet+music+easy
    • http://bizuvab.katasangkhae.com/uploads/1/3/1/8/131856005/xipajitekijiw.pdf
    • http://bopemule.mrssylva.com/uploads/1/3/1/3/131398455/lijizozakesu-vasazijiri.pdf
    • http://files.epathletichalloffame.org/uploads/1/3/1/4/131438324/df990e994.pdf
    • https://cdn.shopify.com/s/files/1/0438/3683/3954/files/76584236076.pdf
    • https://cdn.shopify.com/s/files/1/0437/6012/4061/files/weragijiwofepusoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6451/7023/files/tugotinumikorut.pdf
    • https://cdn.shopify.com/s/files/1/0431/5250/7036/files/15815336656.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6721/files/tasaxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kovutuku.pdf
    • https://cdn.shopify.com/s/files/1/0428/2122/2567/files/breaking_dawn_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/2447/4531/files/71655373774.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9475/files/muslim_marriage_sample_biodata_for_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/7714/7547/files/sewokalupananap.pdf
    • https://cdn.shopify.com/s/files/1/0433/3774/4552/files/sijadugiwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gozoba.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_off000063fb.bin
7687f56b62cbf25d7de90b361da4c05448824b6c658e7d5a2620d1081bcf9a26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FB 5476 bytes
font_01_sfnt_off0000768f.bin
a137adefb5f5a0262aff59976f43759338952ed4dc696088deda1b2a2d3dad3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x768F 14920 bytes

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