Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a80a5ab71f8098…

MALICIOUS

PDF

37.9 KB Created: 2020-08-31 01:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3748e71208c541d2a6da333085f9212c SHA-1: 2c1c152e8d359b58eb17e8a06cc93f166dafeae6 SHA-256: 60a80a5ab71f80983bb3b2a4d629a14701f580fa704deb8f808babc598c7c1fb
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, some of which are confirmed benign but others are not. The presence of a 'download' button lure further supports a malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

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.ru/wix?keyword=gcc+puma+iii+driver+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8073/6165/files/zokudimoforafiwuxetekak.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/jquery_ajax_post_form_data_serialize.pdf
    • https://cdn.shopify.com/s/files/1/0436/5081/0014/files/javascript_format_vscode.pdf
    • https://cdn.shopify.com/s/files/1/0437/6382/6840/files/20515051332.pdf
    • https://static.usrfiles.com/ugd/b8c837_06c2953bfe0242299008cf429c93311e.pdf
    • https://static.usrfiles.com/ugd/73f3b0_cf6648b696d14d83ad1e008c785c3f82.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_b98f1c6155b94956af07c1853e290234.pdf
    • https://static.usrfiles.com/ugd/4ae4db_bb2e958929cd4d769b0efcab308076b1.pdf
    • https://static.usrfiles.com/ugd/b56239_a230508ea97c4b3b81c71266748da420.pdf
    • https://static.usrfiles.com/ugd/bf650e_a197f1be878944949139264422cc9dd9.pdf
    • https://static.usrfiles.com/ugd/516793_450e460cb7814a268ef188d657cc99f6.pdf
    • https://static.usrfiles.com/ugd/5b9365_0b41fe93d9f3473589d4bd131806e1d0.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_f5a1c083b1f14daab1afceb6ea1c0f2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_260a36ff4bd146d7914a3785e69143f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_126fc4e8036b4a018433c4911e9352bf.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_off00005591.bin
03f35d5aaba206d3ee12b7777c24620db18fcb3f9875aa7302a939866ae16edd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5591 5224 bytes
font_01_sfnt_off0000675a.bin
7990f2bf62cf86e80386af51a41500a9db046f361c182d7da6f956ee8c3d4e67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675A 10436 bytes

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