Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece780b046213770…

MALICIOUS

PDF

46.6 KB Created: 2020-08-30 19:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be44aa991378b5f996037d56809d613c SHA-1: 1bf87a4b7e81048d878d61efe943e211d103a23b SHA-256: ece780b0462137705fc8d863cb751c071a410acb55205d99ecc30ca0f683265a
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=camscanner+premium+apk+latest'. This URL is presented in a way that suggests a download lure, further supported by a low-severity heuristic for a 'download button'. The document body, though heavily obfuscated, contains the same URL and references to 'camscanner premium apk latest', indicating a social engineering attempt to trick users into downloading software. The presence of numerous other PDF links, while some are marked benign, suggests a link farm strategy, potentially to obscure the malicious 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.club/wix?keyword=camscanner+premium+apk+latest
    • https://static.usrfiles.com/ugd/5b9a87_eccfa43f7e954be6a638db293eaa2827.pdf
    • https://static.usrfiles.com/ugd/7ff653_9aae6193133344a88aa5ae46c627adc9.pdf
    • https://static.usrfiles.com/ugd/b8c837_ddc0630f1c2343548252af4e0678ed85.pdf
    • https://static.usrfiles.com/ugd/b8c837_1bbad9c8a3194167a5ba6c559356eb84.pdf
    • https://static.usrfiles.com/ugd/e4a001_6b87381cf637422db22f89b2ab577162.pdf
    • https://static.usrfiles.com/ugd/ae059d_e918247e73534acbbb216201def1d5cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef698924a61c4b1e9fa3640e73b71dec.pdf
    • https://static.usrfiles.com/ugd/8b97dd_c0d88452ad474407b338cec7917122c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa7348c0ba49440286388a7f8114c242.pdf
    • https://static.usrfiles.com/ugd/b8c837_00dd6d23b30d4a7fa91d0b87e0244c30.pdf
    • https://static.usrfiles.com/ugd/f96b02_05ef2c2beb3f437386b288af2aef3622.pdf
    • https://static.usrfiles.com/ugd/353d00_e2f3e2f1d8ed4953b24701a05f1787ca.pdf
    • https://static.usrfiles.com/ugd/a467d2_1b444ace6779486c8891c8c7380149d7.pdf
    • https://static.usrfiles.com/ugd/784815_af153bbf78004085aee3bdd0cef89174.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_off00007071.bin
3ad53ca997bf6fde83c68b723c790f90666472272ff044c0fb147de298d8e0e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7071 5048 bytes
font_01_sfnt_off00008181.bin
036e8021e837155fa4ba594afab5758eeeaf1e97d0c512cd7e4606174916849a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8181 14084 bytes