Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba9205c833f6bb49…

MALICIOUS

PDF

52.5 KB Created: 2020-08-06 12:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b235f8f0dc2d517d9267caa1ac000647 SHA-1: 23109984b1a6083911912d944f66973ecf120f5d SHA-256: ba9205c833f6bb49b26ba280a5a25091728205ec245e21815577609bfd59e59e
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'jazz standards piano sheet music pdf' and the malicious URL, suggesting a lure. The presence of multiple unknown URLs hosted on file-sharing domains further supports the malicious intent. No scripts were extracted from this sample.

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.cc/pify?keyword=jazz+standards+piano+sheet+music+pdf
    • http://files.connectorofpeople.com/uploads/1/3/0/9/130969054/sigenadigazovabip.pdf
    • http://files.cardenhomebuilders.com/uploads/1/3/2/6/132695575/rupexupo.pdf
    • http://files.manisha-sharma.com/uploads/1/3/1/4/131482954/8631d.pdf
    • http://files.thebrooklynbarberacademy.com/uploads/1/3/1/3/131398362/4a55f85be9edc.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/36277889273.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/58449443666.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/wijitipigirumasopudegafu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3630/3782/files/62318344474.pdf
    • https://cdn.shopify.com/s/files/1/0429/9309/0714/files/21501391261.pdf
    • https://cdn.shopify.com/s/files/1/0430/5800/4117/files/75419458964.pdf
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/bewasesok.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/zewivamudokitem.pdf
    • https://cdn.shopify.com/s/files/1/0436/1243/8685/files/36545687829.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/votozozefowikakazo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7437/8138/files/fusozimida.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/siwigaverim.pdf
    • https://cdn.shopify.com/s/files/1/0437/8584/6933/files/99369697619.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_off000079a3.bin
3194b3e77a0d00ac89e768042b196292835b3952d7a4094c7c310363a50f4a90
pdf-font-stream PDF embedded font (sfnt) at offset 0x79A3 5404 bytes
font_01_sfnt_off00008be6.bin
654df1e4293b35cd0b12eb04a03f3108ed807d80db28c3f4b53941be4fea5378
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE6 10428 bytes
font_02_sfnt_off0000afbd.bin
84650fe671c70ac66f3af0994468c9b9feb42d01905b0f030d5781e095ef8e52
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFBD 16100 bytes