Malicious PDF — malware analysis report

Static analysis result for SHA-256 45dff0fb6e10de1f…

MALICIOUS

PDF

52.3 KB Created: 2020-08-05 23:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b6c2e92b743f17c86a323eb2eba4777 SHA-1: e70339ba38d202a04f18aafd0d2fa6483747385c SHA-256: 45dff0fb6e10de1fbb6a3822c1fc325e833fa9d635c21a6617f287030f295ff4
128 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one identified as a malicious redirector. The document body text, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=braille+scale+modelling+pdf', which is also flagged as a malicious redirector. The presence of a 'download button' heuristic further supports the lure mechanism. The file likely serves as a delivery mechanism for further malicious content via the redirector.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=braille+scale+modelling+pdf
    • http://files.morningrosehouston.com/uploads/1/3/1/4/131408913/wevije.pdf
    • http://files.cantonguitarsociety.org/uploads/1/3/0/7/130740493/faee2a7f.pdf
    • http://files.stewardsfortomorrow.org/uploads/1/3/2/6/132683330/9a615c8.pdf
    • http://files.judithavers.com/uploads/1/3/1/8/131856112/8387156.pdf
    • http://files.hollyboyter.com/uploads/1/3/0/7/130775071/sevagibisuvijoxesu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/essentials_of_biology_3rd_edition_mader.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/92875364736.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/22513511833.pdf
    • https://cdn.shopify.com/s/files/1/0449/7158/9800/files/anand_srinivasan_books.pdf
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/greatest_albums_of_all_time.pdf
    • https://cdn.shopify.com/s/files/1/0436/0873/5907/files/calculus_on_manifolds_spivak.pdf
    • https://cdn.shopify.com/s/files/1/0437/7441/0910/files/70982419391.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/belezin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tefukina.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3695/files/15099384127.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/17781834648.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/tactics_for_toeic_listening_and_reading_test_free.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_off00008f43.bin
4e4517e842060cd7722772b0f6be739641bdb947fb6101598d082c847d9472f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F43 5524 bytes
font_01_sfnt_off0000a1f6.bin
67d5bd27a7ff76990f821fe48a2b143b2955525646d9cd0b0c8aaa75a8c7a65b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1F6 10132 bytes