Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f44096a3476f6b…

MALICIOUS

PDF

56.1 KB Created: 2020-07-27 07:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab8b248b294492bb147150028ae889fd SHA-1: ba2ed9b28d5e4ae41e509cf5f4271e16729ea95c SHA-256: e5f44096a3476f6be7aa0e6e067a10320f5f49788a471bfa26a7097a42d4ae21
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated, but the presence of a link farm suggests an attempt to lure users to malicious sites, likely for phishing or malware distribution.

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=constraintlayout+android+example+androidhive
    • http://files.pmawm.com/uploads/1/3/0/7/130738933/lesutubivutuwi_tekivegirole_gagujapodunen.pdf
    • http://files.peacefulplacesinc.org/uploads/1/3/0/7/130739718/suzibegedabuwijen.pdf
    • http://files.woodlandforestchurch.org/uploads/1/3/0/8/130813401/5089e5334c98f.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/gurerevilanazome.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/64559101732.pdf
    • https://cdn.shopify.com/s/files/1/0432/0736/0667/files/buwadesun.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/bakufuwefes.pdf
    • https://cdn.shopify.com/s/files/1/0430/5436/6877/files/1842191166.pdf
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/26791487798.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/nagovetuxawutumaruwasisim.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8535/files/86189771670.pdf
    • https://cdn.shopify.com/s/files/1/0428/4294/7750/files/71947231471.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/84683350111.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/
    • https://cdn.shopify.com/s/files/1/0432/073

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f6c.bin
912f2baa7f7bf9e011c464c7d05eef5df21b9095661c2808b9f0e7617acb9607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6C 5336 bytes
font_01_sfnt_off0000a169.bin
1f7bccbe979db2648c6dade2a7c499b06540c80ad9ddd70f565f7ad5f34bb93a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA169 15924 bytes

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