Malicious PDF — malware analysis report

Static analysis result for SHA-256 901ed39f5953279e…

MALICIOUS

PDF

44.2 KB Created: 2020-08-07 08:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eaa1e98dccc9819a704c64fd7c79327f SHA-1: 087fb3b3120ab1377b843f9fd3d8dfa91e38a67d SHA-256: 901ed39f5953279ed5998a85693906ea6297b06fbf3f0db172c7511c4473fe62
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, with one pointing to a known malicious redirector at 'ttraff.com'. This redirector is likely used to obscure the final malicious destination. The document body, though partially corrupted, contains text suggesting a lure related to 'esl conversation board games pdf', which aligns with the malicious redirector URL's keyword parameter. The presence of numerous links to Shopify domains, while many are benign, suggests a tactic to blend in or leverage legitimate platforms for hosting or distribution.

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=esl+conversation+board+games+pdf In PDF document text
    • http://files.bookingcumbria.co.uk/uploads/1/3/2/3/132302716/54d824d23.pdfIn PDF document text
    • http://files.knowledgetraks.com/uploads/1/3/1/3/131384442/7295214.pdfIn PDF document text
    • http://files.desertbeagle.com.au/uploads/1/3/2/7/132710795/923f75937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6350/0197/files/tape_stop_vst.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8685957786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0409/9735/files/substance_abuse_counseling_theory_and_practice_5th_edition_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/devuxabosuzenirodajarasis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6771/7270/files/stewart_calculus_7th.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/administrao_financeira_e_oramentria_fcc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/15626260794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5089/2440/files/86942820106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2336/7335/files/40285288779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0858/7933/files/vakabiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/vuvonaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nuxekenosagulowagegur.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cff.bin
97ba7b934b77be55e60651dea6c4d43e8e0014da298e64bfb5d7b4315308e105		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFF 5632 bytes
font_01_sfnt_off0000801a.bin
f4bf7792bb619e0389a218adbb936ebe26a1d310e89ae460a8dd4d4fc2a023f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x801A 10824 bytes

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