Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a326be33f3a700a…

MALICIOUS

PDF

42.0 KB Created: 2020-09-19 07:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2789e3fd26daba657ae4c88b6c6fdc0e SHA-1: 20e2f3cd14e9d20ece8a4a4f19b329dd3dece9be SHA-256: 8a326be33f3a700a36f98af1856c8669c3e8b4f7bb3dd0c40c496b85b704a741
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.001 Malicious Link

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.me'. The document body also contains a lure to install a browser extension or update, a common social-engineering tactic. No scripts were extracted from this sample, but the presence of malicious redirector links and the social engineering lure strongly suggest an attempt to lead the user to a malicious site.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.me/wix?keyword=traffic+exchange+bot+free
    • http://files.thecurrencymatrix.com/uploads/1/3/1/4/131410158/220cb9a76ee5b52.pdf
    • http://files.glcec.net/uploads/1/3/1/3/131398149/4c02387612ae190.pdf
    • http://vubafipi.spaceschool.ca/uploads/1/3/0/7/130739624/41db3709c106ca.pdf
    • http://files.iphonerepair-inlosangeles.com/uploads/1/3/1/4/131455463/5816b826bd111.pdf
    • http://zepuso.taureauxroug.com/uploads/1/3/0/8/130874019/5ad077aec958bd.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/python_data_analysis_example.pdf
    • https://cdn.shopify.com/s/files/1/0439/8976/2206/files/pso_mag_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/8486/3893/files/11495107258.pdf
    • https://cdn.shopify.com/s/files/1/0432/1257/0783/files/japanese_construction_equipment_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/1847/7987/files/80670714748.pdf
    • https://cdn.shopify.com/s/files/1/0432/3452/5347/files/how_instagram_videos_on_android.pdf
    • https://cdn.shopify.com/s/files/1/0486/6080/7848/files/nashville_sounds_current_score.pdf
    • https://58196efb-4d42-43a8-ab89-88e0db7a00e7.filesusr.com/ugd/5f4192_7ca589305fae4411ba5193c6e9b28d01.pdf?index=true
    • https://23a31da1-4ec1-4979-b9d8-e1ee8ce0c3a1.filesusr.com/ugd/49488e_8575ceeff5f2407fb05e7172bc094aba.pdf?index=true
    • https://d844abdb-4576-4ffd-bb6c-1b76c05e6c43.filesusr.com/ugd/fa6f14_af70730045614c658014a18e78361bae.pdf?index=true
    • 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_off0000662b.bin
437aa35550422c8296c51fa54752a8a360fb9757b4a46c7e8c771d4a3d865664
pdf-font-stream PDF embedded font (sfnt) at offset 0x662B 5092 bytes
font_01_sfnt_off00007781.bin
12001103a162db8e63c99fb5080aae7e684b127ea16366cafe942ef00114306a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7781 10348 bytes