Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf47935dad32bf8…

MALICIOUS

PDF

40.8 KB Created: 2020-08-20 05:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acacb25f00979fb3b98f031ac160df44 SHA-1: 4cd47b6f45614a86e8a3c53abdc58f9ce6a03ea0 SHA-256: aaf47935dad32bf85daf07a09b4ca9b958e9b2f5061e231ca0e6739491eded27
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for users seeking email writing formats. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility.

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=email+writing+format+for+leave
    • http://files.positivelyobedientcanines.com/uploads/1/3/2/3/132302764/f81fded48c90c91.pdf
    • http://files.studio-lady.com/uploads/1/3/2/6/132682039/8601303.pdf
    • http://files.sharing-international.org/uploads/1/3/2/6/132682040/6452909.pdf
    • http://pekulowe.suehuitt.com/uploads/1/3/0/7/130776279/gadosazita.pdf
    • https://cdn.shopify.com/s/files/1/0428/4969/7959/files/kemupigelowoso.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/kojogesejebevimimixen.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/37642357351.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dekafarisajanitid.pdf
    • https://cdn.shopify.com/s/files/1/0432/3082/2555/files/lubadopisutekuru.pdf
    • https://cdn.shopify.com/s/files/1/0437/9069/6597/files/minecraft_pe_skyblock_server.pdf
    • https://cdn.shopify.com/s/files/1/0435/3923/4967/files/pomusofulemu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5932/2773/files/zulez.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/woxaxiriso.pdf
    • https://cdn.shopify.com/s/files/1/0430/7291/3557/files/html_format_to.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_off000062b5.bin
dff555cbef9400feba7ae11bb882f79714f77a035140a81bbaf511971dbc393e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B5 5020 bytes
font_01_sfnt_off000073cb.bin
5408afc84c738ec3f161d3eb057ff23f7f2542f45b6bceb8eab60d6870f53ec8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73CB 10240 bytes

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