Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2671a20671a66b…

MALICIOUS

PDF

47.5 KB Created: 2020-07-31 22:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc5014f23eea051ab40dc1e7cad51b79 SHA-1: d44b97eb72b7fc05057ce849236bb261ffd5e05e SHA-256: 9c2671a20671a66b13493550921e70227a92b0daf279724ccfb374e02ceee882
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, https://ttraff.cc/pify?keyword=act+won%2527+t+connect+to+ffxiv, is designed to lure users into clicking it. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a link farm or redirection tactic. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=act+won%2527+t+connect+to+ffxiv
    • http://files.autumnthoughts.com/uploads/1/3/1/3/131384718/vinudop.pdf
    • http://files.fundraisingsos.com/uploads/1/3/0/9/130969572/3711004.pdf
    • http://files.floridakeysoceangallery.com/uploads/1/3/1/3/131384335/6123659.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/22110072475.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/tewakumibiposozigokudepe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0837/6482/files/709267159.pdf
    • https://cdn.shopify.com/s/files/1/0435/7731/1395/files/59279866734.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2775/files/81471990266.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7074/files/xixipelivukisewinis.pdf
    • https://cdn.shopify.com/s/files/1/0429/5298/2684/files/72140189836.pdf
    • https://cdn.shopify.com/s/files/1/0431/1462/7223/files/54849511060.pdf
    • https://cdn.shopify.com/s/files/1/0441/3207/3624/files/32149277277.pdf
    • https://cdn.shopify.com/s/files/1/0428/2354/9094/files/35576131274.pdf
    • https://cdn.shopify.com/s/files/1/0434/2808/5912/files/susajiropu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3797/4950/files/fezubupisalowuz.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c46.bin
a63f7a206e47bad3d70c912a8b46c1a6a6201b4635a7ce0d8f71834f4165c8ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C46 4392 bytes
font_01_sfnt_off00006b52.bin
f797f66d1f251137c6990aafb4360fcbc4de41b62854f12a2d36bc4575a0a5df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B52 10152 bytes
font_02_sfnt_off00008e0f.bin
d21a7fc198e2dbcb9b040cb75dab8cf98619bf1634d79e1d2b6cd60f14bc1e82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0F 16084 bytes
font_03_sfnt_off0000a2bc.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2BC 4324 bytes

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