Malicious PDF — malware analysis report

Static analysis result for SHA-256 221fc7c4650dc97e…

MALICIOUS

PDF

46.8 KB Created: 2020-08-30 16:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83517d0584ad5078ff4126f797324db1 SHA-1: ac4006e382e6cf5fa21439cecc81b142c4edf337 SHA-256: 221fc7c4650dc97e5cf7120bac4039c4a8c0621dc4a1ba898b646a9a563ba379
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=introdu%25C3%25A7%25C3%25A3o+a+engenharia+bazzo+resumo'. This indicates a social engineering lure designed to redirect users to malicious content. The document body, though heavily garbled, contains the same URL, reinforcing the malicious intent. The presence of a PDF link farm heuristic further suggests this document is part of a larger campaign to distribute malicious links.

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.com/wix?keyword=introdu%25C3%25A7%25C3%25A3o+a+engenharia+bazzo+resumo
    • https://static.usrfiles.com/ugd/b8c837_ed0b716124984bd295055a03a17a085f.pdf
    • https://static.usrfiles.com/ugd/cac9e4_7fb663f0aaca464b8b7a10a1e71a9d12.pdf
    • https://static.usrfiles.com/ugd/2ac701_6d8143ad81854d958aa633c6a71b9b0b.pdf
    • https://static.usrfiles.com/ugd/d1c05f_a26b973820474a098bfeea70e0271fec.pdf
    • https://static.usrfiles.com/ugd/b8c837_446b3853681d4ffa8a5fb538553834d4.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6073/files/72770340007.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/tigir.pdf
    • https://cdn.shopify.com/s/files/1/0438/3123/0624/files/linux_shell_scripting_tutorial_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/church_information_card.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/northstar_4_reading_and_writing.pdf
    • https://static.usrfiles.com/ugd/5e81b9_4662aeeaaaa94580b2543319bb277c9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5f0a7616f2c4122a05a0dc4150c0a8c.pdf
    • https://static.usrfiles.com/ugd/0e2875_0279362f4d624a9cb9f11d7a05cef14c.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_cc1dca339e7742b5b8b0b14c257f1051.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000642d.bin
1983688e204735c47ecc14ce045db0d3669becdf1e17e458e345ad04dc20fe09
pdf-font-stream PDF embedded font (sfnt) at offset 0x642D 5716 bytes
font_01_sfnt_off000076d8.bin
2aa5a579aa76bfdb6d0b463f47e592a2791d798be9565e6b0e5edb150bc9c0f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x76D8 13556 bytes
font_02_sfnt_off00009df3.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF3 4324 bytes