Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4979ca785247b22…

MALICIOUS

PDF

42.8 KB Created: 2020-08-20 06:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c310fb6a3c3ed1f9c1aaa6ae1f1a5482 SHA-1: d09f2714f836dc6f5d5b988bef803aabd1c37e21 SHA-256: e4979ca785247b2220ca5aff025167ef9cadf974ea60cef0cee2357246bb811f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a deceptive document body referencing "Acronis bootable usb format" and includes a critical heuristic firing for a malicious redirector link. This link, https://ttraff.cc/pify?keyword=acronis+bootable+usb+format, likely leads to a malicious site. The PDF also contains a link farm heuristic, suggesting it's part of a larger SEO-based distribution scheme. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=acronis+bootable+usb+format
    • http://files.osdtda.net/uploads/1/3/0/8/130814124/wiwerosogusod.pdf
    • https://cdn.shopify.com/s/files/1/0432/7905/7056/files/letutewasavupozuvi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6920/files/99989734780.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/jurnal_internasional_akuntansi_keperilakuan.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/da_form_1380.pdf
    • https://cdn.shopify.com/s/files/1/0430/5498/9466/files/burimikujewoviwibut.pdf
    • https://cdn.shopify.com/s/files/1/0429/7034/9731/files/lorulatebagubotifujel.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4830/files/nokunijove.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/pibesotagolotidusomezozos.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/39568598335.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_off00006994.bin
ea0c88a12eccddaac4d459d587aef4d11ab6d1ee5c897b3f89b03aaca8f9b4b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6994 5156 bytes
font_01_sfnt_off00007afd.bin
115e9f198cf7e7c1628b1625355e64d5e4e8f295c7286c1175707c258ef3b5c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFD 10388 bytes

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