Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ed9b76d8079451…

MALICIOUS

PDF

51.5 KB Created: 2020-08-09 23:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 172374c677ae1e3f4a6fdf1b7846603a SHA-1: 45460028d830e67b0f17eb2fca1a46fb31c7cb4c SHA-256: 23ed9b76d8079451c0747e9e66e9d74e2768ccfe899a17a3e026497d0192b925
160 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it's a malicious redirector link, pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous external links, one of which is to 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a remote support lure suggests a social engineering tactic to gain further access or control.

Heuristics 4

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=baixar+pdf+para+celular+android
    • http://files.sydneyinsightmeditators.org/uploads/1/3/1/3/131398095/zolesifufurezevijuz.pdf
    • http://files.thelittlethingsilove.com/uploads/1/3/2/6/132681749/nexebozekex_gesuvabav_ramor.pdf
    • http://files.wfyouth.org/uploads/1/3/1/6/131607063/35f412c1e559c67.pdf
    • https://cdn.shopify.com/s/files/1/0435/0250/2054/files/examples_of_systematic_risk.pdf
    • https://cdn.shopify.com/s/files/1/0439/1917/9944/files/canara_bank_account_statement_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/english_consonants_and_vowels.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/mofowatofofada.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/tabavabaxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2071/4137/files/nachalo_book_1.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/xevusenukasolipejowarep.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/88490504102.pdf
    • https://cdn.shopify.com/s/files/1/0434/2421/9293/files/kobawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/bodujefaxotoponibamoman.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_off00008c5a.bin
28aa96a3834039ae44fcb36d1bfe81365267dbf84227aa221af21f678ac63996
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5A 5088 bytes
font_01_sfnt_off00009dc1.bin
4f57feee9c829c31beba642f27dbfbc9c61fa334c297f03a9b57a364807dcfd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC1 10460 bytes