Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7eb77acddc1c16…

MALICIOUS

PDF

41.1 KB Created: 2020-08-07 21:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37843816916dc78e7b36bcd367cc8cf8 SHA-1: 41aada91b53175a7c5f3b0d6f5e4fbcba4af7321 SHA-256: 6d7eb77acddc1c161429818a3ce21d68fbf767c2d5ca435736fb2f7097381769
154 Risk Score

Malware Insights

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

The PDF contains a link farm and redirects to a known malicious domain, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=phonics+worksheets+pdf+for+kindergarten, which is a known malicious redirector. The presence of numerous links to external PDFs suggests an attempt to manipulate search engine results or distribute further malicious content.

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.com/pify?keyword=phonics+worksheets+pdf+for+kindergarten
    • http://files.fountaincityfc.com/uploads/1/3/1/3/131398333/furojagoboxel_rosabafonowoni_rirod.pdf
    • http://files.noticeandwonder.com/uploads/1/3/2/6/132695714/71aa2c2a1343edb.pdf
    • http://badik.thetrueathleteproject.org/uploads/1/3/0/7/130775735/3973546.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2925/6613/files/36596776474.pdf
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/20471216409.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94229011204.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/kevivezodubo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7511/files/89311303725.pdf
    • https://cdn.shopify.com/s/files/1/0436/1990/9794/files/80014626774.pdf
    • https://cdn.shopify.com/s/files/1/0433/4528/1183/files/42412354372.pdf
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/48292500155.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8387/files/71234706151.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0956/files/vakivo.pdf
    • https://cdn.shopify.com/s/files/1/0440/9815/8744/files/tojizupomimibetidotug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9983/2995/files/11234394045.pdf
    • https://cdn.shopify.com/s/files/1/0453/2836/7771/files/human_anatomy_and_physiology_laboratory_manual_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/kuxiv.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_off00006230.bin
c667571cb4819a40ef042504a5fb0a806b6b5096691c810e1899443ef34b4294		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6230 5540 bytes
font_01_sfnt_off00007518.bin
c43b188c9b21c0ec28f4f7eafa0d4a881648ae9d71bd13f181f54214d9d410f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7518 9928 bytes

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