Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fa9a4b9c7d7dcd…

MALICIOUS

PDF

53.0 KB Created: 2020-07-31 04:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e352bb92525a5a564155bf523bf7f4ab SHA-1: c9952599ffa98531d508072c5fa207b84a1f5a01 SHA-256: 05fa9a4b9c7d7dcdf5010300b50e0146b57cc8577c034aacd872c9425cc2e5a2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is flagged as malicious. It also hosts a large number of external PDF links, many of which are hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The document body, though heavily obfuscated, contains text related to 'Trend Micro Worry Free Advanced PDF' and 'wkhtmltopdf', indicating a potential lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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=trend+micro+worry+free+advanced+pdf
    • http://files.miguelbatalha.com/uploads/1/3/0/7/130776656/353f27.pdf
    • http://files.photographybydennisj.com/uploads/1/3/2/8/132814086/pawububeboreperov.pdf
    • http://files.elizabethkilcoyne.net/uploads/1/3/1/0/131069789/7769695.pdf
    • http://files.casalebenedetti.com/uploads/1/3/1/3/131379099/zizekoxagazala.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6971/0242/files/94819920390.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/48347000840.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/36243351335.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/zedenuvoje.pdf
    • https://cdn.shopify.com/s/files/1/0432/8741/2900/files/ruzivevebit.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/36699124726.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/25712157026.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/veserezidevuwawusiben.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3077/files/dobovixofapulexinefo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/62161062522.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/55195319911.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/foxipikobo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5992/9503/files/84325929617.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_off0000935e.bin
95d85166d25a537dbf5290809a2daf91b73eb28bf802a77603168bfd153480b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x935E 5000 bytes
font_01_sfnt_off0000a44c.bin
7b5efc7e7bd3ed5b34c6bc1db460a600e64e609099e8f58e86418748cc7092e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA44C 10120 bytes

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