Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dbb8fe1db26b71b…

MALICIOUS

PDF

38.1 KB Created: 2020-08-16 23:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa9e412b0670709e6aaa0042f2f0c8c7 SHA-1: a7e4af39e0aefcd8f31ba9f12a0bed8cce1046e5 SHA-256: 1dbb8fe1db26b71b6fea84812c4752d12983fc974c1d159d3269be72e252d7dd
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though partially garbled, contains text related to job formation and employment, suggesting a lure. The ML classifier also strongly indicated maliciousness. The primary IOC is the malicious redirector URL, which is likely used to host further malicious content or phishing pages.

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=formation+agent+commercial+immobilier+pole+emploi
    • http://files.innovativearts.com/uploads/1/3/0/7/130775021/demuzebesanef-jepip.pdf
    • http://files.engagecamps.org/uploads/1/3/1/4/131406785/8708042.pdf
    • http://files.revolutionsigning.com/uploads/1/3/1/3/131378779/xojufuzu.pdf
    • http://files.beacontheatreworkshop.org/uploads/1/3/1/3/131383664/cee3c5.pdf
    • https://cdn.shopify.com/s/files/1/0428/6427/9718/files/install_rstudio_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/workplace_safety_inspection_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0432/3174/0066/files/majulabofiripiwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/22578932502.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/87230603382.pdf
    • https://cdn.shopify.com/s/files/1/0437/9010/6775/files/banking_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0436/9160/6170/files/mechanical_behavior_of_materials_dowling_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/cofferdam_construction.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_off000058c8.bin
044872d63f818f45f7f8bb9e5f236667aeddee6df677cae9063f6277f197691f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58C8 5172 bytes
font_01_sfnt_off00006a45.bin
dab78e754ba9a4e4ad86ceb9911b7a7cf43c975e9fa552b9c2233b093b533d5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A45 9736 bytes

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