Malicious PDF — malware analysis report

Static analysis result for SHA-256 0060d354b9e13fa7…

MALICIOUS

PDF

39.6 KB Created: 2020-08-21 15:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a81b1cba704d2f8f92a001ca06e969a SHA-1: c36257c4d0586e4036221b57e19e80b66800d016 SHA-256: 0060d354b9e13fa75974375f5569fde2e1bf8a2d0552ba22f4a373c96df6f58f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm pointing to external resources. One of these links, 'https://ttraff.cc/pify?keyword=internet++manager+module+chrome+web+store', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=internet++manager+module+chrome+web+store
    • http://files.awomanandherstories.com/uploads/1/3/1/4/131437680/c0c28565.pdf
    • http://files.jbtherapyatx.com/uploads/1/3/1/1/131163613/49766030a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/java_spring_tutorialspoint.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6230/files/30474638625.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/sakovizadojonapu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/50416669360.pdf
    • https://cdn.shopify.com/s/files/1/0433/5543/9263/files/spanish_english_timesheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/8280/8472/files/tuxeka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/class_10_maths_coordinate_geometry.pdf
    • https://cdn.shopify.com/s/files/1/0447/3257/9996/files/20218188488.pdf
    • https://cdn.shopify.com/s/files/1/0435/1678/8900/files/vezuronasowijidorodape.pdf
    • https://cdn.shopify.com/s/files/1/0448/1895/6448/files/how_to_register_staruml.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_off00005c79.bin
645c826d208bb890bf425acc3b106e5e951a6bc4cea55f9858e7b9be726e7824
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C79 5520 bytes
font_01_sfnt_off00006f0e.bin
ee5a40ad5bc876192354f8d0d2a43c9f04119147d85eea6b34d3aae706c1fef0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0E 10152 bytes