Malicious PDF — malware analysis report

Static analysis result for SHA-256 61896cfb25d9f7f9…

MALICIOUS

PDF

53.8 KB Created: 2020-07-08 23:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0057d06343fb5bb332d68f68a7e9182 SHA-1: bdb2ecfdd95a86feff740afb4a85456db6a547b7 SHA-256: 61896cfb25d9f7f922a7abe4b2cac55b5f3b80b6f99bbe512da7dad288cb1a0f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, indicating a link farm or phishing attempt. One URL, 'https://ttraff.cc/wb?keyword=1914%20luciano%20canfora%20pdf', is flagged as a malicious redirector. The presence of numerous PDF links suggests an attempt to manipulate search engine rankings or direct users to malicious content. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/wb?keyword=1914%20luciano%20canfora%20pdf
    • http://files.bbluntsheabutter.shop/uploads/1/3/1/3/131383018/bajof.pdf
    • http://files.saikmusic.org/uploads/1/3/2/7/132740415/67c8893d65fe7.pdf
    • http://files.foodanimalbiosciences.org/uploads/1/3/1/4/131453943/zokusemuxojel_tatenufemokab_xudiki.pdf
    • http://files.themewsbodyworkclinic.co.uk/uploads/1/3/1/8/131856844/lunixene.pdf
    • http://files.fringeboutiqueto.com/uploads/1/3/1/3/131398000/xedepogozirok-vilut.pdf
    • http://files.authorkimfox.com/uploads/1/3/1/3/131379612/kemunafejebos_furugamoros_vagububike_wivosoruda.pdf
    • http://files.carolinastormhedgehogs.com/uploads/1/3/1/6/131637291/fanipewonosewagafuv.pdf
    • http://files.foralwaysjonghyun.com/uploads/1/3/1/6/131637352/kutazobov.pdf
    • http://files.hairtostayny.com/uploads/1/3/2/7/132740439/4335554.pdf
    • http://files.ataraxiaphotography.com/uploads/1/3/1/4/131455883/jazozixure.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://bivuwid.files.wordpress.com/2020/06/pumumokoporazujufiji.pdf
    • https://nategavi429270663.files.wordpress.com/2020/06/77274735812.pdf
    • https://peboxemodu.files.wordpress.com/2020/07/28814882786.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90379225571.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vemuvuferakodumi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vukabisozudetilo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zorugeligix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.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_off00009620.bin
77f17dda9c4b795d8b52678bf28106f3194bf234572ef1b523a120b3594e1417		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9620 4856 bytes
font_01_sfnt_off0000a6a0.bin
56bbfca1933d64ea84d7fa086712b58bff44d4c1e4698eb29fdb7c45f55ae9cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A0 11012 bytes

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