Malicious PDF — malware analysis report

Static analysis result for SHA-256 717382dbd9173d4c…

MALICIOUS

PDF

37.0 KB Created: 2020-08-14 00:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51a11c5b370ce16270ad1669eaa21ae4 SHA-1: 1b364b4a709a432a22d88f810c82498432dcb27e SHA-256: 717382dbd9173d4c427781f52840f5c2b9f7661cf394cc8ce8660157cb42eea8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.cc/wb?keyword=subalterns%20and%20the%20raj%20pdf`. Additionally, it exhibits a PDF link farm, with numerous external PDF links, many hosted on `cdn.shopify.com`. The ML classifier also strongly flagged this PDF as malicious. The presence of these links suggests an attempt to redirect users to potentially harmful content or malware downloads.

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/wb?keyword=subalterns%20and%20the%20raj%20pdf In PDF document text
    • http://kipufa.angelikabail.com/uploads/1/3/1/6/131636879/zurakerezaxilefaka.pdfIn PDF document text
    • http://files.donciedoodlesohio.com/uploads/1/3/2/7/132710603/b0a9e85.pdfIn PDF document text
    • http://jofuk.indoorcyclinginstitute.com/uploads/1/3/0/9/130969772/vutubovimafajil.pdfIn PDF document text
    • http://nisez.carolinesteiermcclintic.com/uploads/1/3/1/3/131379730/cdd3bfc.pdfIn PDF document text
    • http://files.brewtonfirst.org/uploads/1/3/0/7/130739340/6075021.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7013/6230/files/pinugetewoxure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6337/7048/files/49395596010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9970/7805/files/exercises_present_continuous_affirmative_negative_interrogative.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6936/4629/files/fourth_universal_definition_of_myocardial_infarction_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/what_is_passing_score_for_aws_certification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5111/3887/files/bakudaxepazujazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6999/7217/files/67931421935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/gawenisegugabozagojap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6515/5489/files/math_symbols_chart.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051bb.bin
2e99ebe2de49a71c1c6a0c1b53891399ec92aa9f153e74dc7a38ca229c3e4695		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51BB 5448 bytes
font_01_sfnt_off00006434.bin
ae4590e1d7710fbbe3cdebfac6c43efccd1034c486c928be787da79025c9a5d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6434 10304 bytes

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