Malicious PDF — malware analysis report

Static analysis result for SHA-256 1000ff2023779b0a…

MALICIOUS

PDF

71.9 KB Created: 2020-08-19 13:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43cead97fc2214c2ea5d33825049d07d SHA-1: 9193539034c53274ca2a1ff1a462ad6a38cf93d0 SHA-256: 1000ff2023779b0a1400caa128a03e2cd6a5f8466f0fee57537fd4e3b58819e0
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=lipids+journal+author+guidelines', suggesting a phishing or scam attempt disguised as author guidelines. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful sites.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=lipids+journal+author+guidelines
    • http://files.arlingtonmsband.com/uploads/1/3/1/6/131606087/ddee7.pdf
    • http://files.mmbasketball.com/uploads/1/3/2/6/132695321/muzem-wiruru-jowapegogejeji-nixifatofep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/travel_magazine_layout.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.pdf
    • https://cdn.shopify.com/s/files/1/0430/4066/9849/files/fapimododuvitodalasetinod.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/53145588767.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/63694966173.pdf
    • https://cdn.shopify.com/s/files/1/0429/3342/0195/files/vefana.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/49091229035.pdf
    • https://cdn.shopify.com/s/files/1/0435/7862/2111/files/advanced_english_vocabulary_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/8330/8955/files/bibitupisuwezixazudajul.pdf
    • https://cdn.shopify.com/s/files/1/0437/2486/5685/files/69747969294.pdf
    • https://cdn.shopify.com/s/files/1/0434/6943/9141/files/1207174260.pdf
    • https://cdn.shopify.com/s/files/1/0435/2406/3392/files/john_maxwell_5_levels_of_leadership.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/perafofujekan.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_off0000dc1a.bin
40558ec74058464baf2c76393f5647277f6bb7622a9b78ae070e93d7c528591d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1A 5236 bytes
font_01_sfnt_off0000ede9.bin
21e9ec918e70159c2fec469f6e8fa8e49c152cfe99360093c992c6c2b2603389		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE9 10700 bytes

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