Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f0c7dc2614cbbd…

MALICIOUS

PDF

81.6 KB Created: 2020-09-12 13:38:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f825f91d7777317d6c686a41b1736de SHA-1: 61ca8218e508a19c1dffb35e35c34fd3e0fea75c SHA-256: f3f0c7dc2614cbbd51ca50d3cb49798608f6b0e3c624f2e9d7c2556bb1bede50
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that promises a software crack. This link is embedded within the document body, suggesting a social engineering lure. The presence of a large number of external PDF links, many hosted on static.usrfiles.com, indicates a link farm designed to improve SEO for malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.club/wix?keyword=passport+photo+maker+5.+15+crack+free
    • http://files.itmspeakers.com/uploads/1/3/0/7/130776601/buxagowapoz-xowagab-navufogudovo-vuzenupu.pdf
    • http://files.drawinguntohim.com/uploads/1/3/1/4/131406749/588408.pdf
    • https://static.usrfiles.com/ugd/69695d_0c75bf254e2c46c9b4c647d12c98f9fe.pdf
    • https://static.usrfiles.com/ugd/9058e5_0a3ce4d0e91d4033a526f69ea98e41ba.pdf
    • https://static.usrfiles.com/ugd/a32c20_29c867a761694e2c9469a59e3e06e94f.pdf
    • https://static.usrfiles.com/ugd/fbccce_2c54145eaadf49ba919e07699591ae0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2931eb0f4b647fc8cead60f5e2cafda.pdf
    • https://cdn.shopify.com/s/files/1/0461/7099/6889/files/cannon_fodder_game_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0445/3462/8516/files/kylee_strutt_gif.pdf
    • https://cdn.shopify.com/s/files/1/0437/0019/1387/files/pikikofomekun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojedeteremedadedarovir.pdf
    • https://cdn.shopify.com/s/files/1/0431/9507/2672/files/58980631404.pdf
    • https://static.usrfiles.com/ugd/b8c837_da2133d936164a218f79a8d2f4a3d882.pdf
    • https://static.usrfiles.com/ugd/6908d7_f9d9e7941cca4f31b5f11bb9785a54ed.pdf
    • https://static.usrfiles.com/ugd/6924eb_d0198d7f5ed241aa993c2bae941e32fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a36094868c549edb7d52b3539906ddd.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_off0000a751.bin
62903ea7c12ae494cb345510076a0be3b11d4651c3da83c89d7ef187c48f771a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA751 22068 bytes
font_01_sfnt_off0000ec77.bin
e86123bad6ddfa4fea714daedb5c0ecd742caa47bf3fa62aa0b337b3a6d14d3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC77 5496 bytes
font_02_sfnt_off0000ff13.bin
e550df74d5d47ad2fe3a95b9b006c516ef0c39f51bebd5446f6d90d89fc3e049		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF13 2976 bytes
font_03_sfnt_off00010b32.bin
c3e0e736e335f1a22f1acd63bd10faeb781623fb059c9e1201012bbb145be44a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B32 13968 bytes

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