Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a871fe13accd5e0…

MALICIOUS

PDF

46.0 KB Created: 2020-08-31 05:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c77a59ad13416c881c0891e2fce8fd0 SHA-1: 84436c0813daabe2de914efdb127147536729106 SHA-256: 6a871fe13accd5e016701d08ee2237ac81e5c83c075e9315a4664fdcc6caf83d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to external PDF files, which is characteristic of a link farm used for SEO manipulation or to host malicious content. One of the primary links, 'https://ttraff.cc/wix?keyword=start+up+nation+conditii', is flagged as a malicious redirector. This suggests the document is designed to lure users into clicking through to potentially harmful websites.

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/wix?keyword=start+up+nation+conditii
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/71686647902.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/44007372188.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5645/files/chicken_invaders_5_free_game.pdf
    • https://static.usrfiles.com/ugd/158fb9_f76a3846ca7d409bb60839b8cb7abf6a.pdf
    • https://static.usrfiles.com/ugd/c6ac46_874f8cd31d81430eb0bb9faac6ed45ac.pdf
    • https://static.usrfiles.com/ugd/d94ae5_9dff34decd8646e8bcb9603a841eb532.pdf
    • https://static.usrfiles.com/ugd/455f95_2641e8dd9a4e4eecbcf9abd9e12df26f.pdf
    • https://static.usrfiles.com/ugd/d55797_473bfba83d5949ddb5ecb2e4872be142.pdf
    • https://static.usrfiles.com/ugd/cdb50c_cb5b4435b9cc442b9ab928a09dd01bff.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b67de8ac186408984b0f9405165d63d.pdf
    • https://cdn.shopify.com/s/files/1/0437/2856/8474/files/62007310559.pdf
    • https://cdn.shopify.com/s/files/1/0434/7920/4006/files/17652828189.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/90387227464.pdf
    • https://cdn.shopify.com/s/files/1/0434/7985/9366/files/madonumujuzuximelatomida.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ce.bin
c1ee83622a8d9f2a0078606f642fe2e4b6262749fe537290cf373263b88679be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62CE 4960 bytes
font_01_sfnt_off000073ad.bin
f88400f0e4fd8627494da5ae23b2a03bb90870e66c236576827cbf51f4e9ef08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AD 10088 bytes
font_02_sfnt_off0000965a.bin
97990adcc91a1e334b404002f9a6b356dd0e0e66c9193a0499481f503a30e292		 pdf-font-stream PDF embedded font (sfnt) at offset 0x965A 16076 bytes

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