Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2da66df71a85197…

MALICIOUS

PDF

37.1 KB Created: 2020-08-22 02:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4c5d8f19ff4e80d221e449282cc44e8 SHA-1: b7604f0bb96f1b6ab6e6f5a6e702e09c750a1d11 SHA-256: a2da66df71a851970992f3d5ab6a9261fb22eac4e840414fcc5f56faee5614ed
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 pointing to Shopify domains, but one critical link redirects to `https://ttraff.ru/pify?keyword=aliens+full+movie++mp4`. This indicates a link farm or redirection tactic designed to obscure the final malicious destination. The ML classifier strongly supports the malicious nature of this PDF. 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.ru/pify?keyword=aliens+full+movie++mp4
    • http://files.icewaterrecovery.com/uploads/1/3/2/6/132681670/4845144.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81159011373.pdf
    • https://cdn.shopify.com/s/files/1/0431/8927/2725/files/infarctus_du_myocarde_ecg.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/koromewogifusujogiwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3774/files/oracle_alter_user_unlock.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73807437975.pdf
    • https://cdn.shopify.com/s/files/1/0434/0046/2501/files/mimitizunijizevadifem.pdf
    • https://cdn.shopify.com/s/files/1/0438/9735/6443/files/nancy_drew_sea_of_darkness_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/63580567549.pdf
    • https://cdn.shopify.com/s/files/1/0434/6462/2242/files/97667267862.pdf
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/wavudetosemufapumabutesu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16779745642.pdf
    • https://cdn.shopify.com/s/files/1/0434/3971/8562/files/saxuture.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_off00005188.bin
c703f3f631f98fd49267e619fd136a62b10b55f3e9873af892a31453f82e4942		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5188 4876 bytes
font_01_sfnt_off00006223.bin
6525edd0721ae8546360d88b268532f928c5b147f2882c403815e6bd290137a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6223 11292 bytes

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