Malicious PDF — malware analysis report

Static analysis result for SHA-256 77a1429754a7c39d…

MALICIOUS

PDF

39.6 KB Created: 2020-08-31 12:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 458e1da6d7fcc9a8062813342d36e420 SHA-1: 96687d40a114a1a7ae795732e112fc4839a0958f SHA-256: 77a1429754a7c39d2efebbc0070e689bbb96654f0bb9af1513af6e13f3bf0756
154 Risk Score

Malware Insights

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

The PDF contains embedded links and a document body that mentions 'Casio watch bands', suggesting a lure to attract clicks. Heuristics indicate the PDF links to known malicious redirector infrastructure and is part of a link farm. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malicious redirection attempt, likely delivered as an attachment.

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.com/wix?keyword=casio+watch+bands
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3bcfef_4ff4a621cc36418f8d738113f8eb5f4e.pdf
    • https://static.usrfiles.com/ugd/e1d12c_9f342b17d66d40fbb07366f07377f06f.pdf
    • https://static.usrfiles.com/ugd/8a419d_0dd41e7962964d25ba8cbce457fcc169.pdf
    • https://cdn.shopify.com/s/files/1/0439/5696/1438/files/desire_resort_pearl_trip_reports.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/wepubedefabuta.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/xirurufisevosibibub.pdf
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/32744591119.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/53934923564.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4020/files/similarity_test_worksheet.pdf
    • https://static.usrfiles.com/ugd/0aab01_38bcbbfecab0450883bc1efb99de13fb.pdf
    • https://static.usrfiles.com/ugd/5cf23b_6a3b6223e19c4c2cbc011d340b73c975.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9df642da5774e1194a80f0934fb8a8b.pdf
    • https://static.usrfiles.com/ugd/0d089b_0ce4f79ae6e2453fbb64eca3652c6326.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_off00005e2c.bin
813ce4e7f136567a2ed5dc8792cb2c79fb2d99808bf09d001c1bf6a8e3d5463a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2C 5036 bytes
font_01_sfnt_off00006f4f.bin
febfc2f1076d6beda54326fab17277d853017fdeb05045bff4b0a8e86f6034b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4F 10116 bytes