Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c303af989c6ed4b…

MALICIOUS

PDF

44.9 KB Created: 2020-08-03 14:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b98d5b76705c27dba46a54bf9466c1d SHA-1: f68a6334680c1e354b694012ca8e0dd979d13116 SHA-256: 2c303af989c6ed4b15289cdf02efb60f419c9b5b334c53994d22988cc923aa6a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.cc/pify?keyword=hindu+calendar+september+2020+pdf'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and includes the same redirector URL. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful 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.cc/pify?keyword=hindu+calendar+september+2020+pdf
    • http://files.trouthide.com/uploads/1/3/0/7/130775033/rupefekitom.pdf
    • http://files.computerzone1.com/uploads/1/3/1/6/131606668/wojatixodo.pdf
    • http://tasep.parksummerprograms.org/uploads/1/3/1/0/131070872/bifagusi.pdf
    • http://files.hilltophero.org/uploads/1/3/1/0/131070356/b413c1b.pdf
    • http://files.thesacredyes.com/uploads/1/3/1/4/131408537/3997902.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2040/files/70027175160.pdf
    • https://cdn.shopify.com/s/files/1/0431/7655/8746/files/65604838004.pdf
    • https://cdn.shopify.com/s/files/1/0428/4756/8039/files/temenamukizemunop.pdf
    • https://cdn.shopify.com/s/files/1/0429/9292/6873/files/15242254150.pdf
    • https://cdn.shopify.com/s/files/1/0429/5009/9107/files/8010663821.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/36719728267.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/zuxametisamoderip.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/thaumaturge_hunting_log.pdf
    • https://cdn.shopify.com/s/files/1/0433/6015/7855/files/jazemibuwupusexijimarasiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdf
    • https://cdn.shopify.com/s/files/1/0436/4566/5433/files/11387649761.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49893706483.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070a9.bin
0f59a8b5180a676757b23b3200617970ab43330cb483c9a0f68c2fcfd6ddf3fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A9 5676 bytes
font_01_sfnt_off000083db.bin
0f5b21de007fd1f396472dff201aeefaf1bcdb266ad5e15bd5d43ee0c1a3d710		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83DB 10076 bytes

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