Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2f446941c5c3e5…

MALICIOUS

PDF

36.9 KB Created: 2020-08-23 08:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab82bc14da73f478859e972440a807bd SHA-1: d4ea0f12e74108ce48d0218adc088f24534e6420 SHA-256: 9f2f446941c5c3e58f7cb4cd9bc6aa927e356bc373e31dbca1d79c6627887dab
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, specifically a URL designed to appear as a download for 'acer aspire e14 touchpad driver free'. This is a common lure to trick users into downloading malicious files. The PDF also contains a large number of embedded links, many of which point to Shopify domains, likely as part of an SEO spam campaign to improve search engine ranking for malicious content. 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=acer+aspire+e14+touchpad+driver+free
    • http://files.scbailacademy.com/uploads/1/3/1/4/131437671/5953042.pdf
    • http://files.ethosimmigration.com/uploads/1/3/1/4/131438418/pixoxinowuvagozisuso.pdf
    • http://files.maryannminersartist.com/uploads/1/3/0/7/130775498/zefipitewudo.pdf
    • http://files.americalibertyforum.com/uploads/1/3/0/7/130739652/nawoso.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/22550408828.pdf
    • https://cdn.shopify.com/s/files/1/0435/4582/1333/files/21882457214.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9670/files/36841081348.pdf
    • https://cdn.shopify.com/s/files/1/0430/1943/6185/files/30352026101.pdf
    • https://cdn.shopify.com/s/files/1/0437/8719/0434/files/38135293158.pdf
    • https://cdn.shopify.com/s/files/1/0432/6716/2276/files/sotokoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/78817448657.pdf
    • https://cdn.shopify.com/s/files/1/0435/9516/9950/files/coordinate_system_in_autocad.pdf
    • https://cdn.shopify.com/s/files/1/0434/5482/4598/files/list_of_syn_and_anti_addition_reactions.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_off00005338.bin
f09108e1da11744756e82e7cfbf283017efa85cda412450338e68f545b6ba940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5338 5400 bytes
font_01_sfnt_off00006599.bin
68aeb745d12584641f50989fcd54a15c5d248d540dc5d02c962d40a0b865f95c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6599 9744 bytes

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