Malicious PDF — malware analysis report

Static analysis result for SHA-256 2357b2a675a2e435…

MALICIOUS

PDF

43.0 KB Created: 2020-08-09 00:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69c77ee6f7b4d92936ec66fec73cc354 SHA-1: 089f8433d0c91483f921507593d842f146d2e68a SHA-256: 2357b2a675a2e4355e2436043f5e4c67d2b85c09122569c7fa2e134d167b6742
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a known malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=jurnal+alkalinitas+air+pdf, which is designed to redirect users to further malicious content. The document body itself is largely obfuscated but contains references to the malicious URL and other PDF files hosted on various domains.

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=jurnal+alkalinitas+air+pdf
    • http://files.pemachenacu.com/uploads/1/3/1/8/131858287/fememizukuse_poxutotogo_rizukidilemor.pdf
    • http://files.marcytcm.com/uploads/1/3/1/4/131438405/71db4.pdf
    • http://dujezofen.lisawebbermusic.com/uploads/1/3/1/1/131163590/fepipetamuvob-pitumuxoto-lexerimir-kurolegukenar.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/35581821852.pdf
    • https://cdn.shopify.com/s/files/1/0431/0060/2525/files/dufosufuxexuresuzatoxur.pdf
    • https://cdn.shopify.com/s/files/1/0440/2806/7990/files/barocco_storia_dell_arte.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/56873201860.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/60647554848.pdf
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/44542204118.pdf
    • https://cdn.shopify.com/s/files/1/0430/5249/9098/files/50457874283.pdf
    • https://cdn.shopify.com/s/files/1/0435/3556/4959/files/japoridiwopumurobegagum.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/17914905376.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/applied_linguistics_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/8281/7441/files/arnold_blueprint_to_cuts_phase_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/3707/3314/files/how_to_speak_english_fluently_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1644/files/tizavewipevevurepugoko.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_off00006be4.bin
e9f84f5afda96c1b05995379bf443701e2b67d1d7cf86e76fb891d4e030be4bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE4 5088 bytes
font_01_sfnt_off00007d44.bin
041a7dfb1280a354822d8e642efa8bd4368e289320ee2e11c1ca3b5789809f5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D44 9944 bytes

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