Malicious PDF — malware analysis report

Static analysis result for SHA-256 2515f26d373628ab…

MALICIOUS

PDF

43.6 KB Created: 2020-08-15 03:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dc4a18ae135de5a63df7c8063fd1bf5 SHA-1: f57ee9a2c97fb50dbb952f78402721d768a94c46 SHA-256: 2515f26d373628ab2f1a36786a3c4ade6ca36fbbd27fcd4ff050b015f0e7714c
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to a URL designed to lure users with a fake "Windows 10 home activation key". This link redirects to a known malicious domain. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic to distribute the malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=windows+10+home+activation+key
    • http://files.playbyplaytheatre.org/uploads/1/3/0/7/130739593/65fc568030b.pdf
    • http://files.vivavocestyling.com/uploads/1/3/1/3/131398099/513887.pdf
    • http://files.wildcraftedoils.com/uploads/1/3/0/7/130776603/taluxixafilutajenak.pdf
    • http://files.shopkazaru.com/uploads/1/3/1/4/131437005/jasilogule.pdf
    • http://files.cdl4dvd.com/uploads/1/3/1/4/131453111/1959074.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jikoleluvotejagumali.pdf
    • https://cdn.shopify.com/s/files/1/0436/6021/4425/files/microsoft_azure_certification_roadmap.pdf
    • https://cdn.shopify.com/s/files/1/0443/9523/3446/files/jungle_boogie_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/74759632314.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/74273704418.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/30993239151.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1320/files/51060542230.pdf
    • https://cdn.shopify.com/s/files/1/0435/2871/6440/files/57535107232.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/49871775291.pdf
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/the_real_book_6th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/42420069270.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/qualities_of_a_transformational_leader.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_off00006b06.bin
1e8ddbd1f2fee2920cca4c3862b04788b908ae21b5efdbf11896344fd4cf7959
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B06 5576 bytes
font_01_sfnt_off00007df9.bin
b72d3f1765f2db521bd13f20582accad8eedfe695192e0d5c0d93ea5df1a66ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF9 10500 bytes