Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d772c1d94ba5419…

MALICIOUS

PDF

39.3 KB Created: 2020-08-12 06:38:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b7a936f2f3dd380f6520e5a59a30b26 SHA-1: 942078cf42135bac62e220481e13b87f293db778 SHA-256: 9d772c1d94ba54192ba14d589ea68c2e3e6f732678ce27067d357ec251223df0
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=modul+belajar+bahasa+korea+pdf'. It also exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same lure text and URLs, suggesting a phishing attempt to redirect users to malicious content under the guise of educational material.

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=modul+belajar+bahasa+korea+pdf
    • http://files.blaearlychildhoodcoalition.org/uploads/1/3/2/6/132682768/379eb9495e8.pdf
    • http://files.notbysight.shop/uploads/1/3/1/4/131453823/jemekarejet-jeloronorabugu-nulazezawen-mazitebineni.pdf
    • http://files.thunderbearwoodsmiths.com/uploads/1/3/1/0/131070098/6206467.pdf
    • http://files.elsafuria.com/uploads/1/3/1/4/131453333/sudipozafavuda_dovixuzuwo_fanomo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/73111418190.pdf
    • https://cdn.shopify.com/s/files/1/0436/4809/0270/files/vitulerezagufomotab.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/kofejoniwi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1181/6099/files/apollo_tyres_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/3898/8709/files/26690094965.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1713/files/5741886033.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6630/files/basic_electronics_books_free_download_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0435/3399/2085/files/carnatic_music_tamil_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/9278/5818/files/e_squared_pam_grout.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3155/files/64258988331.pdf
    • https://cdn.shopify.com/s/files/1/0439/5335/6955/files/bazol.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_off00005d6f.bin
8bd7283bd66e384c838f51822044ede3bab6ec1c075a025bad5f4f97a841736a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6F 5412 bytes
font_01_sfnt_off00006fd8.bin
1376325aa3d0c3a2e6d4a580a2f9227b3aea357b746be8f836da64f9ec482beb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD8 9536 bytes

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