Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e912f1105e92ff5…

MALICIOUS

PDF

34.7 KB Created: 2020-08-22 17:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b16ec5783f07c3bf7358fd4eed3ac0f9 SHA-1: 2898777df204fc26c02ffddb4217196e8342d226 SHA-256: 4e912f1105e92ff505e1ea250e33e8de0941959b5764dbd751adcbe9195a4105
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Bangla video new cartoon' and the malicious redirector URL, suggesting a lure to drive traffic to malicious infrastructure. No scripts were extracted, and the primary malicious activity observed is the redirection to external URLs.

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=bangla+video+new+cartoon
    • http://files.olatheeastwomenssoccer.com/uploads/1/3/0/7/130740375/780636.pdf
    • http://tivapixi.throughmymillennialeyes.com/uploads/1/3/1/6/131606365/sawuzutibo.pdf
    • http://jelim.janel22.com/uploads/1/3/1/1/131164250/6945667.pdf
    • http://files.odundefestival.org/uploads/1/3/2/6/132695329/90b194880fa.pdf
    • http://files.centralwiballoons.com/uploads/1/3/1/4/131453555/4a3074001d0ea40.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/zabupifanikukuvetifawit.pdf
    • https://cdn.shopify.com/s/files/1/0436/4845/0718/files/58577174249.pdf
    • https://cdn.shopify.com/s/files/1/0436/8538/0246/files/hd_video_recorder_camera_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/47270664038.pdf
    • https://cdn.shopify.com/s/files/1/0435/5883/0229/files/ford_600_tractor_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3993/9994/files/15956143840.pdf
    • https://cdn.shopify.com/s/files/1/0438/8398/7096/files/lajutoveluvefiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/0795/7400/files/megidurefule.pdf
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/86059587539.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/bim_building_information_modeling_definition.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_off00004a49.bin
cd354c54fb5235d63455c4acb64a14f68ffc29e30aa931c2e9d82295c650ed5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A49 5132 bytes
font_01_sfnt_off00005bdb.bin
cf241ea1a3f5988a9fb4654e33009117e9ec70aac360a2cbafb47c8cd5e11ee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDB 10056 bytes

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