Malicious PDF — malware analysis report

Static analysis result for SHA-256 17858cb460589e99…

MALICIOUS

PDF

41.3 KB Created: 2020-08-04 03:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73d68a0b323a6217f0997fe97e70b761 SHA-1: 79938c516e68b90596ecfc2a75956c2debdd6873 SHA-256: 17858cb460589e993f3f55bf4a81a37591d56e92ff09c12a9d4e092b654a4ab2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation. One of the primary links, 'https://ttraff.ru/pify?keyword=annapolis+mall+directory+pdf', is flagged as a malicious redirector. This indicates the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

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.ru/pify?keyword=annapolis+mall+directory+pdf
    • http://files.mylifesaparody.com/uploads/1/3/1/0/131069934/f2e8f3f43ea327.pdf
    • http://files.needavac.com/uploads/1/3/1/4/131409761/guvusividexifet-lowalosim-papubusiw.pdf
    • http://files.realabstractart.com/uploads/1/3/1/4/131438804/lozapexanirola.pdf
    • http://files.fpcrc.org/uploads/1/3/2/6/132695244/vivovato.pdf
    • http://files.chocolatiermatisse.com/uploads/1/3/1/4/131453907/vunafuwugela_guzutajeni_jilaxegom_rukofere.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/liwadaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/8938/7939/files/peguwiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/5258/9465/files/16326050781.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/environmental_science_merit_badge_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/3323/0488/files/heaviside_function_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/fikisod.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/xojevazokuzinawotopim.pdf
    • https://cdn.shopify.com/s/files/1/0431/6777/6919/files/wijilo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7048/7712/files/ncert_binomial_theorem.pdf
    • https://cdn.shopify.com/s/files/1/0433/2139/3320/files/21988549242.pdf
    • https://cdn.shopify.com/s/files/1/0430/7668/1882/files/62990144693.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7576/files/xakemalebig.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_off000061cc.bin
af6dff4eabe58613b230663d3a6d557c8bcf5acd487dd86c1b3bce8dd9ac1646		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CC 5392 bytes
font_01_sfnt_off00007417.bin
86ddbee9501f510abf90d9703c61d6e0d393dbe8d6e93c0d2cb4f4687212ec3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7417 10652 bytes

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