Malicious PDF — malware analysis report

Static analysis result for SHA-256 196a963ced861a3a…

MALICIOUS

PDF

30.5 KB Created: 2020-09-16 23:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c579db6e097eaa0db30ae7364f9bd76 SHA-1: 3a3632533b8666d725420252b1255773720ceda7 SHA-256: 196a963ced861a3ab55596768139e1afb245bd642ed4cee753f57ae6bf4fd373
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.me'. It also exhibits characteristics of a PDF link farm, with numerous external PDF links, many hosted on Shopify. The document body contains the target URL and keywords, suggesting an attempt to manipulate search results or lure users to malicious content. While no scripts were explicitly extracted, the nature of the links and the ML classification indicate a malicious intent, likely to redirect users to a phishing or malware download site.

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/wix?keyword=corridos+alterados+download
    • http://files.laurileesgolf.com/uploads/1/3/1/8/131857270/2504096.pdf
    • http://files.pristineautowrap.com/uploads/1/3/1/8/131856877/2469611.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7935/1968/files/61701312995.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4780/files/employment_form.pdf
    • https://cdn.shopify.com/s/files/1/0438/4066/7808/files/43971499014.pdf
    • https://cdn.shopify.com/s/files/1/0436/7784/3609/files/capital_alphabet_writing_practice_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1588/files/tonefifemuvabedawog.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/putawipuwifipevo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/tavimekosojoxokebatujidot.pdf
    • https://cdn.shopify.com/s/files/1/0439/4621/3544/files/zibusasejepoforeb.pdf
    • https://cdn.shopify.com/s/files/1/0463/3572/1634/files/hepatic_abscess_guidelines_2017.pdf
    • https://cdn.shopify.com/s/files/1/0428/5677/5839/files/19921869554.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_off00003e86.bin
90df99c07bc3145eb34e503d426534ae8831566c5331af88e5af2e09bd8c6455
pdf-font-stream PDF embedded font (sfnt) at offset 0x3E86 4816 bytes
font_01_sfnt_off00004efb.bin
67ae9a7f3041342d900aaf63f4ee08c2917cc7b5361203b70695abe381957fec
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EFB 9116 bytes