Malicious PDF — malware analysis report

Static analysis result for SHA-256 be20f048b6db79d3…

MALICIOUS

PDF

43.3 KB Created: 2020-09-13 03:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8be2de42b8ccaf71bbd1739cbff33d2f SHA-1: 8b06dd9f72a9e4932ae96bbd6eeab61d3dbc8b76 SHA-256: be20f048b6db79d3a101a5fb9de753f6a71463025ac84a65c51b61965a5479ff
120 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 external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.link/wix?keyword=dk64+boss+guide'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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.link/wix?keyword=dk64+boss+guide
    • http://files.jodievees.com/uploads/1/3/1/3/131379832/0a26e4.pdf
    • http://files.theaspieneuroscientist.com/uploads/1/3/1/3/131380641/5905222.pdf
    • http://files.savemartlascruces.com/uploads/1/3/1/4/131453990/zodovud.pdf
    • http://files.savemartlascruces.com/uploads/1/3/1/4/13145
    • https://cdn.shopify.com/s/files/1/0434/5154/7800/files/36647153086.pdf
    • https://cdn.shopify.com/s/files/1/0437/3859/5482/files/8358881892.pdf
    • https://cdn.shopify.com/s/files/1/0438/6213/0853/files/chromatic_scale_guitar_chart.pdf
    • https://static.usrfiles.com/ugd/035627_4a3af8963b36445282947427cf1f1072.pdf
    • https://static.usrfiles.com/ugd/b8c837_b30317aaa5564d66978070745cb83036.pdf
    • https://static.usrfiles.com/ugd/23e9be_4496ca088f5e42feae61ff56293a0e73.pdf
    • https://static.usrfiles.com/ugd/8de238_fa1033a8d3ed49449e2c1bccc6ebc57a.pdf
    • https://cdn.shopify.com/s/files/1/0435/5388/2280/files/35638508074.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5004/files/bharata_rajyangam_articles_in_telugu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fd1.bin
cb3ffcc65578a6cf7831cc75a09acca621c176c101efa7d0fcf699db12c71b5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD1 4796 bytes
font_01_sfnt_off00007029.bin
70335d465f01a12410213427cabfda26d1a2300514565453456fc27baaa1902a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7029 9996 bytes
font_02_sfnt_off00009262.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9262 4324 bytes

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