Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0045460104bd6c…

MALICIOUS

PDF

40.3 KB Created: 2020-08-22 13:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 386b6e99965a8867728a60db4d91247c SHA-1: 7f286aa2ea092cb6248ae76f89037c5127630139 SHA-256: 2b0045460104bd6c98fe0d2b6a13df9d70ae27963480d3f11d68400eb3b008ba
152 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are hosted on potentially malicious domains or redirectors. The primary malicious URL identified is https://ttraff.cc/pify?keyword=spelling+activities+year+2+worksheets, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Spelling activities year 2 worksheets', suggesting a lure to disguise the malicious intent. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious redirector.

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=spelling+activities+year+2+worksheets
    • http://wonapipux.chanandreassend.co.nz/uploads/1/3/1/4/131436978/fogimutinekux_kafuza_xulese.pdf
    • http://files.glasgowfad.com/uploads/1/3/0/9/130969045/eb3a90e9.pdf
    • http://rabuzidu.bresumbrella.com/uploads/1/3/1/4/131453555/8501125.pdf
    • http://xaxajat.regionalpropertynsw.com/uploads/1/3/2/6/132682093/dizebikilexif.pdf
    • https://cdn.shopify.com/s/files/1/0430/2172/9955/files/30315000740.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/68329084863.pdf
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/asterix_le_gaulois.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/80948414651.pdf
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/all-_nba_team.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7203/files/sonejujaradunefapeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8673/files/11703018025.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1205/files/49344480426.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/95520352063.pdf
    • https://cdn.shopify.com/s/files/1/0437/0091/2278/files/dijat.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/34437891154.pdf
    • https://cdn.shopify.com/s/files/1/0429/3600/8870/files/wuzureripejega.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_off00005de2.bin
c0a3528424822e72f4cfd8957fb613560660b2fcdf03a1180d494d96c3a28016		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE2 5748 bytes
font_01_sfnt_off00007189.bin
0dae7a1319dcb4c54daa62d1cc0cc36b04d5d67a6a8680c9a07d621b35774d96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7189 10136 bytes

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