Malicious PDF — malware analysis report

Static analysis result for SHA-256 1572e92f4fd5ffeb…

MALICIOUS

PDF

34.1 KB Created: 2020-08-31 11:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c52b71ac723cb2f4e320d58daf38cc6d SHA-1: a98b54a9ca10f166e15cd2a5364bf3fccf5e8646 SHA-256: 1572e92f4fd5ffeb6e8701ff173615dda59a8b9b9f5bf34c96ac9b732b7302b1
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a service manual. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that this PDF is part of a link farm designed to redirect users to malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of embedded URLs and the nature of the heuristics suggest a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • 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.com/wix?keyword=2004+bombardier+rally+200+service+ma
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/23e9be_e587a28c76b143239a69b1dd872e9b65.pdf
    • https://static.usrfiles.com/ugd/d5cf39_3933a90f9c4947de8e879ba5f18ec199.pdf
    • https://static.usrfiles.com/ugd/76156b_c9e1e324360f441e91b1570c46347141.pdf
    • https://static.usrfiles.com/ugd/b8c837_40ecab15222e4f93acc8affd824c602a.pdf
    • https://cdn.shopify.com/s/files/1/0449/7162/2559/files/periodic_table_black_and_white_download.pdf
    • https://static.usrfiles.com/ugd/79e0dc_598164853b2e40ebaeee5a991ae4196d.pdf
    • https://static.usrfiles.com/ugd/b8c837_955cc8c129214fe992c80447ae5ef0ac.pdf
    • https://cdn.shopify.com/s/files/1/0433/8099/8302/files/47642838305.pdf
    • https://cdn.shopify.com/s/files/1/0434/9054/1733/files/21859994969.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/boxer_protocol.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_off000046fa.bin
47e34faed3c2819088f4ef1a0c9a8495152d40ca32cca65ed6f3a95e73df6d3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x46FA 5656 bytes
font_01_sfnt_off00005a17.bin
d5a46bd8d262ab08c7be166f2b26cc97047ef91a81909328814c330c996baaaf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A17 9956 bytes