Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc11e2c004eed317…

MALICIOUS

PDF

45.1 KB Created: 2020-08-05 02:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e242fe9cc4a19572953594de19fa1d3 SHA-1: 8ef1f7804a43b61e062f5303bccf7ca7986e4ab1 SHA-256: dc11e2c004eed317ee3d898e38f7d9efa8ac3043c04bad4c4b3c1810ff7f547b
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.com. This indicates the document is designed to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the sheer volume of links suggests a link farm or phishing attempt.

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=apache+license+pdf
    • http://files.historic-brookhaven.org/uploads/1/3/1/4/131438151/zoxivodeporex_sibezozubolito_lejifima.pdf
    • http://files.edcentervi.org/uploads/1/3/0/7/130740563/fesomoxuneduf.pdf
    • http://gupekaz.summitatrailroadsquare.com/uploads/1/3/0/9/130969465/4017617.pdf
    • https://cdn.shopify.com/s/files/1/0428/7964/7903/files/celf_4_scoring_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/80006993167.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/20809474273.pdf
    • https://cdn.shopify.com/s/files/1/0435/6797/2515/files/85197415636.pdf
    • https://cdn.shopify.com/s/files/1/0432/6549/1107/files/xejimoxoruzovedej.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/manual_of_war_pathfinder.pdf
    • https://cdn.shopify.com/s/files/1/0432/5251/4979/files/3432796755.pdf
    • https://cdn.shopify.com/s/files/1/0433/6920/1832/files/zanedapisamo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0273/files/wakotibazuxil.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0824/files/50006710094.pdf
    • https://cdn.shopify.com/s/files/1/0432/0506/6907/files/66814891150.pdf
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/dell_c1765nfw_driver.pdf
    • https://cdn.shopify.com/s/files/1/0432/6224/7067/files/watch_secret_diaries_of_a_call_girl.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_off00007286.bin
65e33f8db43de497e70e1092bbc4ac23e7c593d64840fc07bdff676a6d7ec9db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7286 5136 bytes
font_01_sfnt_off00008403.bin
04d9d7ed342a88872c67e61b6f3fa6d30e2798abe3c7d4655a4d7a1f80953bb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8403 10580 bytes

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