Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa915fdfe56d064…

MALICIOUS

PDF

53.6 KB Created: 2020-08-23 00:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b97afffca4c445ace4dac135462b2a60 SHA-1: ef4188f6ed753357b610ad5ca7e412a02656aada SHA-256: afa915fdfe56d0646e8a87c1c6f1f302a919c843cdf8271e9ddb796ace666110
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with heuristics indicating a link farm and a redirect to a known malicious domain. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content or exploits.

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=angular+6+global+variable+in+template
    • http://zewevif.booksandspoons.com/uploads/1/3/2/6/132695471/rupukur.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/vikidodenixaxumixotakob.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/metro_route_map_delhi_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/4430/5061/files/woxejum.pdf
    • https://cdn.shopify.com/s/files/1/0432/2987/2292/files/vurotagigerotinakagab.pdf
    • https://cdn.shopify.com/s/files/1/0430/7048/8730/files/apresentao_comercial_design.pdf
    • https://cdn.shopify.com/s/files/1/0452/0319/4007/files/vusabatuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/56096991692.pdf
    • https://cdn.shopify.com/s/files/1/0448/1184/5793/files/78242484319.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/27773476702.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4651/files/geliwepigonidux.pdf
    • https://cdn.shopify.com/s/files/1/0440/0558/9157/files/enzyme_activity_lab_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/30881275394.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_off000084e6.bin
56e34d6c01a5178fb06c9ed500bd12e5aa178d38a13d6df5bcb98ac7700c331d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84E6 5304 bytes
font_01_sfnt_off000096dd.bin
869a7c4c7eb22a12164a0a46b602f0a69ab3ee6cd6626d4d2bebaa23612afaff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96DD 16340 bytes

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