Malicious PDF — malware analysis report

Static analysis result for SHA-256 d169d5c7f8121b3c…

MALICIOUS

PDF

45.1 KB Created: 2020-08-02 13:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 043d94aed3f4e5060eb1815f894c54e4 SHA-1: e73aaf119ed42e414d3f358993e9802adc89325b SHA-256: d169d5c7f8121b3cd5b01fde4df54fb3f5ef5008d64f14873e9e3515073b3602
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though partially corrupted, contains the URL 'https://ttraff.cc/pify?keyword=why+renderitem+in+jquery', which is flagged as a malicious redirector. This suggests the document's primary purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing. 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.cc/pify?keyword=why+renderitem+in+jquery
    • http://files.lidefo.net/uploads/1/3/0/7/130739028/lelan.pdf
    • http://files.risingachievers.org/uploads/1/3/2/7/132712005/kerupesusizegasenir.pdf
    • http://files.tell-ignite.com/uploads/1/3/0/7/130739308/vizerag.pdf
    • https://cdn.shopify.com/s/files/1/0429/8961/7311/files/88076504812.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/vumuzevaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/5481/5640/files/30159395958.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/namevobavop.pdf
    • https://cdn.shopify.com/s/files/1/0438/5295/5810/files/59638142233.pdf
    • https://cdn.shopify.com/s/files/1/0432/3665/5259/files/60559870154.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/jogolazimetej.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5601/files/58267121070.pdf
    • https://cdn.shopify.com/s/files/1/0432/0700/0219/files/49717067860.pdf
    • https://cdn.shopify.com/s/files/1/0434/7212/6117/files/46035771810.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_off00006b8b.bin
dfe5427c0c858031d94e98e039e809f5c350985db43e25fadd6cbdb0a05a3347		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8B 4960 bytes
font_01_sfnt_off00007c54.bin
b860a5b33cfadf0c509c01dd0ec33f188a7e21842d5b5e785a9c2ade7db02918		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C54 13548 bytes

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