Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54a70d383a22b25…

MALICIOUS

PDF

47.8 KB Created: 2020-07-28 07:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05f84e2d0d39b983f054543bd5fc3de2 SHA-1: 2d1583379a030a2dcbb2dd379d055f7f8fde597f SHA-256: d54a70d383a22b25b37abb632dad77f89f96385c56f98d85e4429868056081a4
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a UC browser login prompt. This link points to 'ttraff.ru', which is known for redirecting to malicious sites. The PDF also functions as a link farm, with numerous links pointing to Shopify domains, likely to obscure the final malicious destination. The ML classifier strongly indicates malicious intent.

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.ru/pify?keyword=uc+browser+apk+login
    • http://files.mobilityextremadura.org/uploads/1/3/0/8/130813550/e13b602d.pdf
    • http://files.stedwardfundraising.org/uploads/1/3/1/6/131606133/getotiwuxedu-jiwuvumegetuj-sagirape-pinefunojemiva.pdf
    • http://files.buyafairytale.com/uploads/1/3/0/9/130970012/1783f5d.pdf
    • http://files.professorwillis.com/uploads/1/3/0/7/130739746/munugu.pdf
    • http://files.professorwillis.com/uploads/1/3/0/7/130739746/munugu.pd
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/73991050469.pdf
    • https://cdn.shopify.com/s/files/1/0437/4839/3112/files/40174108984.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/14380994524.pdf
    • https://cdn.shopify.com/s/files/1/0429/5992/9503/files/51535601633.pdf
    • https://cdn.shopify.com/s/files/1/0437/9380/9557/files/nafukawosedakoxula.pdf
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/nunodatoput.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7327/files/tebapatam.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/sigebis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdf
    • https://cdn.shopify.com/s/files/1/0437/9456/3221/files/9445614234.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bixebor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062e2.bin
f93529dbbb02868fad2ccd7388dc1fe377c0dbfd08819715bfb642ffdf352ed4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E2 5096 bytes
font_01_sfnt_off00007444.bin
abfd1327819f5bcb082deb48616560babe57b22a8a06813bd2e9422cb58c840f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7444 14600 bytes
font_02_sfnt_off00009d02.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D02 16092 bytes

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