Malicious PDF — malware analysis report

Static analysis result for SHA-256 15632fce856f5b11…

MALICIOUS

PDF

42.3 KB Created: 2020-08-07 17:31:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0558aa36614cea5d4a37f09a03b826b SHA-1: 50dadd3d9539f6bad9f6afddba921ecf888295c4 SHA-256: 15632fce856f5b11ebb3c30404889eaf7da5a891cca2cdca605b372335d1cb67
194 Risk Score

Malware Insights

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

This PDF document contains a high number of embedded links, many of which point to potentially malicious redirector infrastructure. The document also includes a lure to copy and paste content into a command-line interface, suggesting an attempt to trick the user into executing a malicious payload. The presence of numerous external PDF links indicates a possible SEO link farm strategy to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=retail+banking+services+pdf
    • http://wagima.soulsistersparanormal.com/uploads/1/3/1/4/131406082/wobexusurajama.pdf
    • http://files.breastfeedinghousecalls.com/uploads/1/3/2/8/132815008/bilini-kejazekoruj.pdf
    • http://files.rvfreedommachine.com/uploads/1/3/0/7/130740066/jopijapitavofukafo.pdf
    • http://files.tri-starglove.com/uploads/1/3/2/7/132740693/1234509.pdf
    • http://files.orienmcneill.com/uploads/1/3/0/8/130814706/4215500.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0491/7917/files/adventure_time_marceline_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xugufu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/kinetico_model_517_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/wow_classic_warrior_tank_bis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65545430121.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/cfop_algorithms_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/5841/1158/files/86206334903.pdf
    • https://cdn.shopify.com/s/files/1/0431/0053/6986/files/laxub.pdf
    • https://cdn.shopify.com/s/files/1/0433/2129/5006/files/increment_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0433/8948/5221/files/burger_bistro_centurion_menu_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/judubipurajupevidese.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/61804807182.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_off000064bd.bin
380d3b80c85a5b3f6a0dc4936f456965d1870007ea336ee6fa0d550b855e39a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64BD 5596 bytes
font_01_sfnt_off000077e0.bin
52088e2b90147b7733f68ca23ca2d82a6ebb26642c90ff3a6e6c7e90c60bdac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77E0 10744 bytes

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