Malicious PDF — malware analysis report

Static analysis result for SHA-256 9780c9480e84ab8e…

MALICIOUS

PDF

51.9 KB Created: 2020-08-06 06:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa6a6beccce3a9d9aa6d9563bd423eee SHA-1: 51189b67445610e5124226b4094ecadca3c34179 SHA-256: 9780c9480e84ab8e8a92ce0e5c601ed52907f98d486d4ed5befc0f380109b5d2
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.ru/pify?keyword=perbedaan+kopi+arabika+robusta+dan+liberika+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs. The document body, though heavily obfuscated, also contains the same malicious URL. This suggests the primary intent is to redirect the user to a malicious site.

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.ru/pify?keyword=perbedaan+kopi+arabika+robusta+dan+liberika+pdf
    • http://files.agapeholisticaromatherapy.com/uploads/1/3/0/7/130739204/824747.pdf
    • http://files.wolfchasecoc.org/uploads/1/3/1/4/131453065/cdd859804d00f32.pdf
    • http://files.clemsonpikappaphi.com/uploads/1/3/1/1/131164479/jirogomaguj_bebumuzopa_zinesalaj.pdf
    • http://files.bridesburgoc.com/uploads/1/3/1/8/131871614/5888667.pdf
    • http://files.dawnentertainment.net/uploads/1/3/0/7/130775403/659c3.pdf
    • https://cdn.shopify.com/s/files/1/0436/7525/4937/files/36084615343.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/xugubekokukofuzabu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0838/5439/files/punizepaxitiwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/5013/9801/files/sozozowujatizumofuxawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7242/9980/files/61656513795.pdf
    • https://cdn.shopify.com/s/files/1/0439/0735/0696/files/moliv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nimapudusakodinufuzexive.pdf
    • https://cdn.shopify.com/s/files/1/0440/1060/2661/files/belarus_visa_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/18208636091.pdf
    • https://cdn.shopify.com/s/files/1/0430/5960/9753/files/guuud_info_robux.pdf
    • https://cdn.shopify.com/s/files/1/0433/8191/5804/files/jadokitomisazo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0135/files/sozerobipujejisodevozomi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/70693998913.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f68.bin
60eebe4dd65cdb931d63fe8ab25d1e42a892a81ddb78fc24718b4bbb71ea4511
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F68 5124 bytes
font_01_sfnt_off000090cc.bin
adcad9787c739fa00c8d978121990de5a35d905b30bb3e69daef221785466aca
pdf-font-stream PDF embedded font (sfnt) at offset 0x90CC 10200 bytes
font_02_sfnt_off0000b3aa.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3AA 4324 bytes