Malicious PDF — malware analysis report

Static analysis result for SHA-256 693c24eec1752d5d…

MALICIOUS

PDF

118.7 KB Created: 2020-08-08 08:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 491370a46452c91284fbdbd95eacb02c SHA-1: 0455391f184a8f23e8935b6a2faf0c749421dedc SHA-256: 693c24eec1752d5d5fa53d18c47272012dab43cc3e9d05c17e97242a2c955eac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'trends in neuroscience and education pdf' and a URL that appears to be part of a link farm designed to attract traffic. This suggests a phishing or scam attempt using a lure document to redirect users to malicious infrastructure.

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=trends+in+neuroscience+and+education+pdf
    • http://files.michelleflessa.com/uploads/1/3/2/7/132710700/1fc6e3.pdf
    • http://files.blankaphotography.com/uploads/1/3/2/8/132816066/29c7b902454a.pdf
    • http://files.mindfulstrides.org/uploads/1/3/1/8/131872054/kidififewejagazir.pdf
    • http://files.enviropolicyblog.com/uploads/1/3/1/8/131856162/mobizipobili.pdf
    • http://files.aoifesodenglass.com/uploads/1/3/0/8/130874598/lilivafomusug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/60151444704.pdf
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/vevunelisaloduwol.pdf
    • https://cdn.shopify.com/s/files/1/0432/6742/4412/files/abbyy_transformer_3._0_pro_pl.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/xiziger.pdf
    • https://cdn.shopify.com/s/files/1/0435/2606/2239/files/65332127240.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/99923340171.pdf
    • https://cdn.shopify.com/s/files/1/0434/6609/6802/files/sanitation_exam_5001_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3609/files/kunotobejekitulamona.pdf
    • https://cdn.shopify.com/s/files/1/0432/2033/6802/files/61375296644.pdf
    • https://cdn.shopify.com/s/files/1/0437/2702/8375/files/wobisifapadilomunojip.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2102/files/99837084071.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_off00018e0d.bin
d7f9bb5d19101c5da7f51a35d3cf201a3acc24b6b7213d506a040805f371d5db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18E0D 5064 bytes
font_01_sfnt_off00019f54.bin
a9101aff0318e8b3151fa1e4ef9b15568adfbb1a314d81e5d3237bcd211caca3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19F54 14484 bytes

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