Malicious PDF — malware analysis report

Static analysis result for SHA-256 d79ac8400d49fada…

MALICIOUS

PDF

64.3 KB Created: 2020-08-16 22:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af996664de8e6d0ec3de7283cf615460 SHA-1: 906a3c3391f521e3c9ed73751078689717667f7f SHA-256: d79ac8400d49fadac7b5441d368a7e262539883ce1eb5a95b1fd9302f65c7c54
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=akuntansi+dasar+1+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0433/5383/3637/files/kubota_parts_manual.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=akuntansi+dasar+1+pdf
    • http://files.thevigilgroup.org.uk/uploads/1/3/0/7/130776215/bekujeradunenonodus.pdf
    • http://files.westsideyouthministry.org/uploads/1/3/1/3/131384721/74dacb.pdf
    • http://files.vetsourcecanada.com/uploads/1/3/0/8/130873708/9817695.pdf
    • https://cdn.shopify.com/s/files/1/0433/5383/3637/files/kubota_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/1935/2739/files/network_interface_card_functionality.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/zuzemopinuvagulifunulozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/85871157128.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/10341022820.pdf
    • https://cdn.shopify.com/s/files/1/0433/0605/7883/files/248151310.pdf
    • https://cdn.shopify.com/s/files/1/0432/0840/9250/files/vibutuxuzupokenige.pdf
    • https://cdn.shopify.com/s/files/1/0435/5925/6225/files/36423661302.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zeranosorijajigafa.pdf
    • https://cdn.shopify.com/s/files/1/0440/0971/7910/files/nigegepipibof.pdf
    • https://cdn.shopify.com/s/files/1/0433/6723/5742/files/steps_of_polymerase_chain_reaction.pdf
    • https://cdn.shopify.com/s/files/1/0430/9535/9641/files/73964961004.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_off0000be8f.bin
09e8c32e046576eefa1820d334e0eddac8df48f974de302b5511f73e9041aaa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE8F 5108 bytes
font_01_sfnt_off0000d008.bin
79b842d8df26fa243dedd800559f6da05d6f2899c017bf16da41f8ced71608b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD008 10620 bytes

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