Malicious PDF — malware analysis report

Static analysis result for SHA-256 66680ee609bf50fc…

MALICIOUS

PDF

49.0 KB Created: 2020-08-08 17:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e279c9faba34d756a583105f94d87bed SHA-1: d61ecbbdb377d21615ad805993dfdbf6ce2714c4 SHA-256: 66680ee609bf50fc90632094fa239b7e71e8a17c7dc00105a8145aa92dbe695f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with one specifically pointing to known malicious redirector infrastructure. The document body, though partially garbled, contains text that suggests urgency, aligning with phishing lures. The presence of a link farm and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content.

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.com/pify?keyword=acarapis+woodi+pdf
    • http://files.hisembracinglove.com/uploads/1/3/1/1/131164260/2d5437d0.pdf
    • http://files.ladukecoaching.com/uploads/1/3/2/8/132815002/tagisenonojajog_fereliwopura.pdf
    • http://files.bfafairfaxbaseball.org/uploads/1/3/1/8/131856352/powipobukufosu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/8439/6184/files/revista_boticario_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/81422267873.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5057/files/drawing_a_heart_opengl.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9389/files/discord_token_file_txt.pdf
    • https://cdn.shopify.com/s/files/1/0434/6282/0005/files/43157083007.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/girotimovu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/remomatowesunagiridu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3629/5836/files/download_schoolboy_q_oxymoron.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/17892168862.pdf
    • https://cdn.shopify.com/s/files/1/0431/6925/1492/files/lascal_buggy_board_maxi_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0437/6893/8647/files/47694170105.pdf
    • https://cdn.shopify.com/s/files/1/0429/9787/4851/files/chief_keef_colors_download.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_off000082d2.bin
ffc0ac208cc3f19a8dcb53cdef84cdbbee6232ca4b8922b0b940a2d9eaca07cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D2 5200 bytes
font_01_sfnt_off000094a6.bin
4313880f6f505624e6f7e1e291859e2224f732cdee52a9566826dd311daf34c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94A6 10140 bytes

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