Malicious PDF — malware analysis report

Static analysis result for SHA-256 d65f2bce0f099fc4…

MALICIOUS

PDF

44.6 KB Created: 2020-08-21 02:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03aabd2a51f31a20af546a4e1bf1ae15 SHA-1: 6b3e687599bc4fc81f5736464e0282a33269d0fe SHA-256: d65f2bce0f099fc41e0f9af497598569f2e298b6c05bf66ba42da8bb9b76e19a
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'View two excel sheets side by side' and the malicious redirector URL, suggesting a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=view+two+excel+sheets+side+by+side
    • http://files.renstrapp.com/uploads/1/3/0/7/130740255/nolajimupegojusofevo.pdf
    • http://files.ayurvedaora.com/uploads/1/3/0/9/130969129/1688497.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/schumann_arabeske_op_18.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/77849951588.pdf
    • https://cdn.shopify.com/s/files/1/0433/9774/2750/files/matekesa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5592/files/98288571740.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pidepuwavulosetanujerepub.pdf
    • https://cdn.shopify.com/s/files/1/0437/2211/3173/files/83194002945.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8330/files/komulakisalapozirovi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29942388251.pdf
    • https://cdn.shopify.com/s/files/1/0436/4953/2057/files/ang_abakada.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/tujibadadurawug.pdf
    • https://cdn.shopify.com/s/files/1/0431/4248/0021/files/zonuregedaxin.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/zegolilipekeraveto.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069a9.bin
7ea2300f4f5f99e3d2439c2415ac086dad00502f4af86d2770e8f42e79806536		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69A9 5088 bytes
font_01_sfnt_off00007b00.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B00 1800 bytes
font_02_sfnt_off0000838d.bin
0c33779b03cbc2d33070adb677e707c8f9d1cb0caf608deccb369395878745e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x838D 9796 bytes

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