Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1a05d171ac743c3…

MALICIOUS

PDF

75.8 KB Created: 2020-08-29 09:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5aa776c234ff59c2257fcf998f4e4bc SHA-1: 017e99d347c8b614ba9d22b25470826a5ce4bd83 SHA-256: e1a05d171ac743c3ad9fcce541d13924570a8f71c5e1c919a75a739a5de45c46
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=harry+potter+y+el+caliz+de+fuego+pel'. This URL is presented within the document body, disguised as a search result for a movie. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=harry+potter+y+el+caliz+de+fuego+pel
    • https://cdn.shopify.com/s/files/1/0428/9147/7159/files/zigejesonulux.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6710/files/75646648606.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdf
    • https://cdn.shopify.com/s/files/1/0431/2544/0669/files/gisikulakekonokewir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/witivebofudesagukitewu.pdf
    • https://cdn.shopify.com/s/files/1/0440/3855/3765/files/71809190031.pdf
    • https://static.usrfiles.com/ugd/b8c837_010506e8282e497f8c70d9024c0094db.pdf
    • https://static.usrfiles.com/ugd/b8c837_e511012b10c148768afb17645d210c95.pdf
    • https://static.usrfiles.com/ugd/b8c837_b41ed9564edc49e481e31d1d9dac9b30.pdf
    • https://static.usrfiles.com/ugd/b8c837_efd35249ba134561b3e8a6ddc2c84531.pdf
    • https://static.usrfiles.com/ugd/b8c837_af2e41115c5e43e69514f13eb34da4bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_3694562c2f81490580e07062b122b439.pdf
    • https://static.usrfiles.com/ugd/b8c837_246c0046a4ab40f8b875618f3232a841.pdf
    • https://static.usrfiles.com/ugd/b8c837_d078420971214a67ad774ede501d4b52.pdf
    • https://static.usrfiles.com/ugd/b8c837_35d153e77efb4c499d5da846a1f45b15.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_off0000e82e.bin
bdaa8608ca9abc7bd57f080b0d3514bb67a983b41164023c21381a7cde818827
pdf-font-stream PDF embedded font (sfnt) at offset 0xE82E 5260 bytes
font_01_sfnt_off0000fa30.bin
858b1fa76ba86654d3e5ccd031eec2d41240c7707a21b89ecbd6f0b3635539bd
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA30 11692 bytes