Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7941163b0fc1aaf…

MALICIOUS

PDF

53.6 KB Created: 2020-08-19 21:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6a0a04a2b12c46dbeee75b086837bda SHA-1: 355711cc73af5ea8f1727110a1037d1d34d65a81 SHA-256: c7941163b0fc1aafbe651e7dbeeee26759ae6ac7208a2f6c3a187d550957c8f6
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 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the malicious URL and references 'Peaky Blinders', suggesting a lure to a phishing or scam page. The ML classifier strongly indicates maliciousness.

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=peaky+blinders+quinta+temporada
    • http://files.horseshoecafeandcatering.com/uploads/1/3/1/8/131856492/55d86.pdf
    • http://wotefavax.sundevich.com/uploads/1/3/0/8/130874198/3dfdf384.pdf
    • http://files.dgw-america.org/uploads/1/3/1/3/131379894/6033505.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0999/files/71347843774.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6102/files/tubuzo.pdf
    • https://cdn.shopify.com/s/files/1/0439/4074/1275/files/kiwafulasenorubem.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2584/files/83537836258.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/vehicle_bill_of_sale_alabama.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9567/files/milegofiw.pdf
    • https://cdn.shopify.com/s/files/1/0438/5544/6176/files/juniper_networks_certified_associate_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/0061/7381/files/31768676659.pdf
    • https://cdn.shopify.com/s/files/1/0435/3366/4408/files/60066800614.pdf
    • https://cdn.shopify.com/s/files/1/0429/6658/1407/files/video_editing_application_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/adding_and_subtracting_fractions_and_decimals_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/figarawevig.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_off00009213.bin
f735edf5785d091016e2fb4384e75a0f033e9ac9dc6c6599323eb3db08a6aaf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9213 5536 bytes
font_01_sfnt_off0000a4c4.bin
37c7144f8c71aea010e2986e934d337e2d1e3d5b44eb48986f04f07d4980fa84		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4C4 10624 bytes

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