Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca80d111be59752…

MALICIOUS

PDF

44.4 KB Created: 2020-08-31 09:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae5df5585bbb94642f59559270da9da9 SHA-1: 770095ff6c4870c8ac5e9926bce6edc6d0ecf331 SHA-256: dca80d111be597525783373cb6654642d47ebf56c6ff5f4dbcf1fe2e9926bcb3
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, indicating an attempt to lead the user to malicious content. The document body, though partially corrupted, suggests a lure related to a 'Chevy solid axle swap parts list'. The presence of numerous external PDF links, many hosted on Shopify, further supports the link farm heuristic. The primary malicious IOC is the redirector URL.

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/wix?keyword=chevy+solid+axle+swap+parts+list
    • https://cdn.shopify.com/s/files/1/0440/4586/1029/files/zezevukumekamazekuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/9605/4690/files/minecraft_dimension_ids.pdf
    • https://cdn.shopify.com/s/files/1/0433/4911/5029/files/62370532814.pdf
    • https://cdn.shopify.com/s/files/1/0440/9176/8984/files/mitsubishi_air_to_water_heat_pump_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/2588/1498/files/pejore.pdf
    • https://static.usrfiles.com/ugd/409ca8_6e22237a5b1f46f398f23d1f972660b5.pdf
    • https://static.usrfiles.com/ugd/a48928_3babcbaac4ef49f7af95a5c01151b06f.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0378/files/mantra_biometric_device_mfs100_driver.pdf
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/topazexutibiruzova.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/muwojuzero.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/macromolecules_lab_report_conclusion.pdf
    • https://cdn.shopify.com/s/files/1/0457/3610/0006/files/wuzabofelap.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1518/files/fovevewiruvuxogitokad.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_off00006f3f.bin
3856bda5997821d12e8bd6ccc8a22ed08e5d4571db665cfd3bb49f90dfd5adee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3F 5276 bytes
font_01_sfnt_off00008147.bin
e496926eb92489e68658dbd1c8630108410100313e6f1e7941a83ff56b402ea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8147 10420 bytes

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