Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb459e4982120be9…

MALICIOUS

PDF

48.0 KB Created: 2020-08-14 08:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbf485a4c32ae017668e6dd73544dd50 SHA-1: ed3c066f6b7d771f54e1e6e076562ba63cd2e922 SHA-256: eb459e4982120be963ef2ecb52824dda0264bdc86e5ad27298cbbe7b7046d9fb
150 Risk Score

Malware Insights

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

This PDF file contains a link farm designed to attract search engine traffic, ultimately redirecting users to a malicious URL. The primary malicious URL identified is ttraff.ru, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF files hosted on Shopify, likely to lend an air of legitimacy. The ML classifier strongly indicated maliciousness.

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=cracks+movie+parents+guide
    • http://files.nsscouncil.com/uploads/1/3/1/3/131382330/5302402.pdf
    • http://files.bonuselkantler.com/uploads/1/3/1/4/131452922/nurutonetedig_vuvimuzoxasa_jididegeb.pdf
    • http://files.liquidsunshinedesigns.net/uploads/1/3/1/6/131606644/6427307.pdf
    • http://files.nonprofitjourney.org/uploads/1/3/1/4/131408928/2768424.pdf
    • https://cdn.shopify.com/s/files/1/0447/5827/0101/files/determination_of_available_chlorine_in_bleaching_powder.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8487/files/1433867954.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vazakiliduvapi.pdf
    • https://cdn.shopify.com/s/files/1/0446/0858/5891/files/2013_audi_a7_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/43094840717.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/61929375375.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4741/files/xuritakirixufutumoxanep.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0589/files/98117094739.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/7068720282.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/capitalism_socialism_and_democracy_1942.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/potupemujolikaxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/borulamutilabonunuw.pdf
    • https://cdn.shopify.com/s/files/1/0444/4202/6150/files/pssc_physics_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/55226468060.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_off00007d5e.bin
43af26b872135b094bac935278c814fbc7f1f93a988593decec07d5e11d56224
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5E 5388 bytes
font_01_sfnt_off00008f9b.bin
d701535c5cc1bd348071f4b5d94b67cedb7a29d9429a2b4c46b8840a70f92b61
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9B 10352 bytes