Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3884d002cec5099…

MALICIOUS

PDF

42.9 KB Created: 2020-08-02 23:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b57be47228138354ae3e171e6d3bfc5 SHA-1: ae73d2115882d6a7eae301844f3b0d0478901ac3 SHA-256: f3884d002cec50998195ac8c042523961f4aef121948c73e06d08fb2e7ec42e9
150 Risk Score

Malware Insights

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

The PDF contains a mass link farm, with a critical heuristic firing for a malicious redirector. The embedded URL https://ttraff.cc/pify?keyword=vis+a+vis+5th+edition+workbook+pdf is a known malicious redirector. The document body, though heavily obfuscated, contains references to the lure 'vis a vis 5th edition workbook pdf' and the redirector URL, indicating a social engineering attempt to trick users into clicking 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.cc/pify?keyword=vis+a+vis+5th+edition+workbook+pdf
    • http://files.vinublog.com/uploads/1/3/0/7/130740323/ad4273654227740.pdf
    • http://files.tomorrowphotos80.com/uploads/1/3/1/3/131379321/guxogefuwizujiguwik.pdf
    • http://files.monaro.com.au/uploads/1/3/1/4/131437813/be131dac66327.pdf
    • http://wurer.thermosenselab.com/uploads/1/3/2/6/132682051/24a2c24.pdf
    • http://files.phfabrication.net/uploads/1/3/0/7/130740589/kuzefafabiz-difojumukad.pdf
    • https://cdn.shopify.com/s/files/1/0434/0937/5383/files/soduk.pdf
    • https://cdn.shopify.com/s/files/1/0431/5542/3383/files/wikatajije.pdf
    • https://cdn.shopify.com/s/files/1/0435/1344/6564/files/ralelimajeganex.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/sirekeju.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/37462154996.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6835/files/35862256872.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdf
    • https://cdn.shopify.com/s/files/1/0431/2206/5557/files/13591305876.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/kulejixevixame.pdf
    • https://cdn.shopify.com/s/files/1/0429/4977/1427/files/xosoger.pdf
    • https://cdn.shopify.com/s/files/1/0430/1206/3391/files/suwoli.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/96192411099.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2646/files/54061409425.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/dovikalewupizosatanidor.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/
    • https://cdn.shopify.com/s/files/1/0430/1206/3

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006852.bin
1abdd78c85a9c02bdcf004923f2be5a4c690dd9c2a6f61531e30e04218b330ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x6852 5544 bytes
font_01_sfnt_off00007b42.bin
fa41a588076d8a5a9fb2f704eb39c8368b4cb46a878549291316877bd0f5bd72
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B42 10252 bytes