Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5edc4a3c24654bb…

MALICIOUS

PDF

46.8 KB Created: 2020-07-17 16:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ffb876d43b5f6f5d2d794c0890befd7 SHA-1: 36141276e620d557d6df8b73d3e6b2b28149e620 SHA-256: a5edc4a3c24654bb11bc3e00028397b3e78d610ebfae4e5cf3be3a6e6c025da0
160 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an error message, prompting the user to click it. This is a common social engineering tactic to lure users into installing malicious browser extensions or downloading further malware. The PDF also hosts a large number of external links, many pointing to benign Shopify domains, but the primary malicious link is to ttraff.com.

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.com/wb?keyword=error%20printing%20pdf%20from%20edge
    • http://files.guyingram.com/uploads/1/3/2/6/132681596/3295852.pdf
    • http://files.tintenbarhall.org/uploads/1/3/0/7/130739059/9214566.pdf
    • http://files.eastcoastmassage.org/uploads/1/3/0/7/130776542/wefuwef.pdf
    • http://files.cedarwoodhealing.com/uploads/1/3/1/4/131453431/259669.pdf
    • https://cdn.shopify.com/s/files/1/0433/0605/7888/files/duvefilewilotipejeda.pdf
    • https://cdn.shopify.com/s/files/1/0431/6607/2994/files/41722034895.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/ritipisofubipasugaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3666/3208/files/1397179839.pdf
    • https://lotodirod.files.wordpress.com/2020/06/sepusinunenuketoberuvawa.pdf
    • https://konuvemove.files.wordpress.com/2020/07/dixameni.pdf
    • https://zuporewa.files.wordpress.com/2020/07/gasarazezonalotod.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5702/files/9604558906.pdf
    • https://cdn.shopify.com/s/files/1/0430/3260/8917/files/malajovan.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/23386713573.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/nuvulebidudi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/63354353548.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/wowegumumilalopuwez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/mativiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/lumurejukoberu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2776/7206/files/migogujigitekigefonaguza.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_off00007ab4.bin
a8caf17672eba1a2535ce26c0ff75334869c47bbc24fb93c5e70fafc071eb26a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB4 4688 bytes
font_01_sfnt_off00008a8c.bin
ad45bc2991feca02986edee3edbda9e14a745b0f1846665f83f655db14b62e40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8C 10432 bytes

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