Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7bc5ec303ca0cd7…

MALICIOUS

PDF

60.0 KB Created: 2020-08-23 16:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c403e8fbf64e063d45a552bdcbef06e1 SHA-1: 000d0692264894f221c9f7ef9e5e2006dd83eb5d SHA-256: d7bc5ec303ca0cd743f178b6304cf4962df4eb2c3dd53abb6ce2fd2ab7d8a798
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=curriculum+template+pdf, which is likely used to redirect users to malicious content. The document body itself is heavily obfuscated and appears to be generated content rather than user-readable text, further supporting a malicious intent.

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.com/pify?keyword=curriculum+template+pdf
    • http://getexen.tracyedmunds.com/uploads/1/3/1/0/131070197/8909577.pdf
    • http://mavokobun.splchampton.com/uploads/1/3/2/6/132680835/dbbd12a.pdf
    • http://jivodone.rensbigportal.net/uploads/1/3/1/4/131407406/4ac988c2340fb69.pdf
    • http://lulirole.learninglandscapes-frlt.org/uploads/1/3/0/7/130776737/777a0e.pdf
    • http://fazawi.dreamingtreewomenscare.com/uploads/1/3/2/6/132695569/a6299977de7b.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/24265867339.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/lijiweforak.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rapuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/gowenarijigaxusabe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5153/9866/files/goluwewovupifugogaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4095/files/27703603878.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/gepigapove.pdf
    • https://cdn.shopify.com/s/files/1/0433/3332/0872/files/vepiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/41968479007.pdf
    • https://cdn.shopify.com/s/files/1/0428/9092/0099/files/13541091517.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_off0000adc9.bin
7c1a0401d7940683c030db86260af9fc4088eddf4dbe636314c044b4f717296d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADC9 5028 bytes
font_01_sfnt_off0000bec8.bin
914872526008d1308542fc16cea34563658a9ab8305c6402f3fcba58ede49197		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC8 10760 bytes

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