Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ce61951c077e43…

MALICIOUS

PDF

46.9 KB Created: 2020-09-07 16:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3ca68a749dadc4d584bb962b8f610bbd SHA-1: 3237af1d219bba27c8471c5607eb55db2867ebd3 SHA-256: 06ce61951c077e43550f1a3bccd5c239d8f7fbf1598aebd87babf1faaf66db4e
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links. The document body, though obfuscated, contains a URL that appears to be the primary lure, directing users to 'https://ttraff.cc/wix?keyword=appium+desktop+android+emulator'. This suggests a phishing or scam attempt designed to redirect users to malicious content.

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.cc/wix?keyword=appium+desktop+android+emulator In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/ba2c19_c9bb6cb75a434077a78677d4ffc06029.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/74a852_3b4fa44fad89493080354234e72637bf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f8de3e_1bbed1d1c70848e8aa6f70f5601f007d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a4e402_ae0e0ef3e2e144f1be04c611a3dabcd2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6fd45c_2fb72e07811140febdd1dd78672af6f1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f6a907_b022102f66c540d19450f122fc15b65d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b58d21_b7670e80161b406f9845cc5122112216.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cf14a4_0bfcf991b12f498eb9a82692d4871e16.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cc3ca9_b2e0a1f09c4c4eddb596dca2bd630b3c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/696b8a_a116c240a5544621916d3cd17659d5db.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/429b25_ed4e20a4704c4701a5c6d08925422a6d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/88891047777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1173/3664/files/sofevajilegirogaparuwimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8250/4600/files/c_template_classes_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4201/1293/files/83935512778.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B7 5160 bytes
SHA-256: 57420846f47e1b759fac1c2b508b4c94ec1f6c9cdcfab56ead6c0014ff0ef8e3
font_01_sfnt_off00008a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A27 10832 bytes
SHA-256: fea33dd2d59c1379eb63d83c80f232b6c08d3e6ac36ed31137645845cb4384b6

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