Malicious PDF — malware analysis report

Static analysis result for SHA-256 36902dcbd116519c…

MALICIOUS

PDF

45.1 KB Created: 2020-08-13 23:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad897c7ae8076c7f3c6daff6a33c87fe SHA-1: 0ab146314018b91314337e3f6b77892a29f4dc3a SHA-256: 36902dcbd116519c6cf679a4e8214b7223211e51c4bbd20af8fc347c96783aee
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicating a link to ttraff.com. Another critical heuristic, PDF_SEO_LINK_FARM, highlights the mass external PDF link farm hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious redirector URL and several Shopify-hosted PDF links, suggesting a lure to disguise the malicious intent.

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=antonio+vivaldi+winter+sheet+music
    • http://fukidifuk.richardrundleelementary.com/uploads/1/3/1/3/131380212/5284173.pdf
    • http://files.windsweptpoodles.com/uploads/1/3/0/8/130873791/7bb6cf.pdf
    • http://files.pecanstreetchristianschool.org/uploads/1/3/1/1/131164387/sapuvibugezimatizib.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5126/files/kudurexez.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1149/files/46976161498.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/7007/files/kijulivasadegutab.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7566/files/4062723401.pdf
    • https://cdn.shopify.com/s/files/1/0448/0778/2557/files/baldor_electric_motor_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0436/7941/6473/files/2004_dodge_dakota_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8031/1203/files/bafg_berlin_antrag.pdf
    • https://cdn.shopify.com/s/files/1/0429/7385/5903/files/83572342166.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/61242827077.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/74461985621.pdf
    • https://cdn.shopify.com/s/files/1/0439/2851/8824/files/sm_bus_controller_driver.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_off0000627f.bin
1763bcc1442f3d0d718361263c34870e5d7af260909c704f6b712a7febb8c214		 pdf-font-stream PDF embedded font (sfnt) at offset 0x627F 5320 bytes
font_01_sfnt_off00007478.bin
2f9d5def98f495f8027a0af0e3da0666dd057731c48fb5c031d0de35d116b474		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7478 15908 bytes

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