Malicious PDF — malware analysis report

Static analysis result for SHA-256 b16326ceffbe08f6…

MALICIOUS

PDF

45.4 KB Created: 2020-08-08 04:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72725ed10c0e017d2485d9e50f397ac5 SHA-1: 1c0a402e59630dfd62de0da8d33849e3f7ec7e0e SHA-256: b16326ceffbe08f6fcfe74d38692d18bf5af87995d01d1a2911faa6c3105cd51
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=anthracnose+of+grapes+pdf'. This indicates the document is designed to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains the same URL and other URLs hosted on cdn.shopify.com, suggesting a link farm or content delivery network used to host the malicious PDF. The PDF also contains a heuristic for a link farm, further supporting the redirection attack pattern.

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=anthracnose+of+grapes+pdf
    • http://files.eguastella.com/uploads/1/3/2/6/132682282/4291642.pdf
    • http://files.vermilionstrings.net/uploads/1/3/1/6/131637362/wizibakezunepagipezi.pdf
    • http://gilala.996revolution.com/uploads/1/3/2/3/132302921/kovezobofufulatu.pdf
    • http://files.oldsheriffshouse.org/uploads/1/3/1/3/131379914/devolirewat_kobawamalodemo_risuzad.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/xomisupi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/balevogigadan.pdf
    • https://cdn.shopify.com/s/files/1/0437/7359/1701/files/94570946195.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/lelubuwen.pdf
    • https://cdn.shopify.com/s/files/1/0434/3532/7653/files/91637595025.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44368867506.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/binary_tree_copy_constructor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69143450337.pdf
    • https://cdn.shopify.com/s/files/1/0429/3279/7607/files/bikokala.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_off00006712.bin
520104ae4b7b99fe239947cd0f352e6eece54cf6c6d897e01f2422eb70f06f88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6712 5116 bytes
font_01_sfnt_off00007861.bin
49d9fd5337f005a8a95755adf9206325768ae30a3267d407f93da38c81e98360		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7861 10120 bytes
font_02_sfnt_off00009aed.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AED 4324 bytes

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