Malicious PDF — malware analysis report

Static analysis result for SHA-256 129a319761a2fdab…

MALICIOUS

PDF

53.9 KB Created: 2020-08-03 07:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8299d00b05272cb82e80ed732a811bfd SHA-1: f2b494912aaef90946c6c00618f77d164fdad122 SHA-256: 129a319761a2fdab21679d20a9e3a2f7213922af0c3c9dbeee99655511f7f73b
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains references to the redirector URL and other URLs hosted on Shopify, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier strongly indicated maliciousness.

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/pify?keyword=proakis+digital+communications+5th+edition+pdf
    • http://files.knikoletaylor.com/uploads/1/3/1/1/131163667/jajunizetupine.pdf
    • http://files.wholesaleabundancesoaps.com/uploads/1/3/1/8/131856205/7563649.pdf
    • http://files.alphaphiomega-betatheta.com/uploads/1/3/1/3/131398010/5311409.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5090/1402/files/33985846757.pdf
    • https://cdn.shopify.com/s/files/1/0435/4883/6004/files/kigagede.pdf
    • https://cdn.shopify.com/s/files/1/0434/3683/4968/files/momunemojinixesigir.pdf
    • https://cdn.shopify.com/s/files/1/0433/7664/0156/files/20164406144.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/remote_desktop_port_number.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/pifaraz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4368/4503/files/zobawuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/mobejawa.pdf
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/78805733238.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a72.bin
6213824b4f18b1bf0d881c63cc76d2e14f8b977ae91f9e35d31b334761a8f6d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A72 7460 bytes
font_01_sfnt_off000083b5.bin
c96dc9db6646ec6be20b07d02141bb10df00443621e0dea8fe61a49fd1a19b33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83B5 5640 bytes
font_02_sfnt_off000096ab.bin
fdd62a568b8ef6f4d96f58bfc801c3b0393508a166184c489f7ae0addce33a02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96AB 10840 bytes
font_03_sfnt_off0000bb83.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB83 4324 bytes

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