Malicious PDF — malware analysis report

Static analysis result for SHA-256 aefe02a76a4be3b9…

MALICIOUS

PDF

69.4 KB Created: 2020-08-16 17:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96ac4892a2e4df8993eb0f67e4759c44 SHA-1: e3c972cf5999a44ce3c1141fd5f593b131adf4ab SHA-256: aefe02a76a4be3b96bac4d3fe53ab01c87801efad8962465771535cb99a1a74d
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.com/pify?keyword=amitabh+bachchan+movie+video'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the lure. The ML classifier also strongly indicated 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=amitabh+bachchan+movie+video
    • http://files.sobergarb.net/uploads/1/3/1/8/131857442/fimudov.pdf
    • http://files.cher-union.com/uploads/1/3/1/0/131070307/5323374.pdf
    • http://files.greatwhiteadventures.com/uploads/1/3/1/1/131163853/4171785.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7653/files/puxejedetiporel.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7063/files/38661131275.pdf
    • https://cdn.shopify.com/s/files/1/0429/1421/8143/files/numinekewudodoweda.pdf
    • https://cdn.shopify.com/s/files/1/0438/2271/0941/files/3117538529.pdf
    • https://cdn.shopify.com/s/files/1/0432/5205/6227/files/givewupajefuta.pdf
    • https://cdn.shopify.com/s/files/1/0429/9656/4131/files/42130306057.pdf
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/80548303458.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0858/files/caveman_to_cosmos.pdf
    • https://cdn.shopify.com/s/files/1/0438/6376/9243/files/21892874016.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_off0000c5ce.bin
30cbbc7973d69299db306684da2e20b5eb905403a43b8c45821be27164ce3ee5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5CE 5060 bytes
font_01_sfnt_off0000d6db.bin
d8f29bc1e22ce634bad0f8689c8070026136318eecd3701fee42d7f56ff3be8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DB 16424 bytes

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