Malicious PDF — malware analysis report

Static analysis result for SHA-256 64313c4caed94034…

MALICIOUS

PDF

57.5 KB Created: 2020-08-27 14:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a988d55887922e04d9807001faec130 SHA-1: 9172acc4d8895b6fbc000317cab237698fe16b3b SHA-256: 64313c4caed94034df2a5db08f988542dedd1cea1dc19b27797c6fcccb01aa26
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to potentially malicious or redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to 'ttraff.me', indicating a redirection to malicious content. The document body, though partially corrupted, includes the same URL, suggesting an attempt to lure users to external sites.

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.me/pify?keyword=comentario+de+plano+urbano+barcelona
    • http://tuxepoti.beasleycounselingservices.com/uploads/1/3/0/8/130874197/782334.pdf
    • http://lotesolu.kira-marie-mccullough.com/uploads/1/3/1/0/131070872/d47232fa8a8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4809/2327/files/93670673981.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1477/files/womifibuxalepameduguw.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2193/files/cancun_weather_forecast_15_day.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4452/files/51535094876.pdf
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/xipojakopowepakiridabas.pdf
    • https://cdn.shopify.com/s/files/1/0431/7760/7324/files/59317228772.pdf
    • https://cdn.shopify.com/s/files/1/0436/4248/6944/files/fuwabamogobakawoboka.pdf
    • https://cdn.shopify.com/s/files/1/0437/7526/2869/files/resume_format_for_accountant_executive.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/88490257821.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a309.bin
319ebdb42de6f8450bba3a21101f010de98ece1e5fa275c122617e8f27a88d56
pdf-font-stream PDF embedded font (sfnt) at offset 0xA309 5084 bytes
font_01_sfnt_off0000b425.bin
e9cbb394a160417e0f0c1151ae35357940c4a9e811198811337b51fb53d5d60c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB425 10776 bytes