Malicious PDF — malware analysis report

Static analysis result for SHA-256 d082881b466f2082…

MALICIOUS

PDF

39.5 KB Created: 2020-08-04 16:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c01e6bae4dfcc0525599a1c49394233f SHA-1: 2bcd4c7189b90257f655e74a93480f8c64bf5797 SHA-256: d082881b466f20823147adce19ed04ff47e01f16deea93e1edd0c35a3b0c0e14
150 Risk Score

Malware Insights

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

The PDF contains a prominent link that appears to be for downloading 'Endnote x8'. This link, however, redirects to a known malicious domain (ttraff.ru). The document body and heuristics indicate a link farm strategy, likely to improve search engine ranking for the lure, ultimately directing users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=endnote+x8+download+pdf
    • http://files.yorkhomebrewers.org/uploads/1/3/1/4/131438582/37207e4820.pdf
    • http://files.graceunderthesea.com/uploads/1/3/2/6/132696285/7278315.pdf
    • http://files.blindinggray.com/uploads/1/3/1/4/131407138/f2c988d2.pdf
    • http://files.dvbpaintings.com/uploads/1/3/0/9/130969192/getafukixene_bisisabufekolut_xelapamirabofi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/lalunor.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/nivubemija.pdf
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/concepto_alelopatia.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/dolegatibimeteginox.pdf
    • https://cdn.shopify.com/s/files/1/0438/1723/8685/files/time_warner_cable_channel_lineup_boxless.pdf
    • https://cdn.shopify.com/s/files/1/0434/0803/1893/files/bepuximupapubajedaserif.pdf
    • https://cdn.shopify.com/s/files/1/0436/9973/2635/files/56098168690.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/27657067032.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20597849085.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_off00005cba.bin
6ef0ef98f288c7b261c2332b5fa63293d0314c5826922795d44bd4cec24352cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBA 5072 bytes
font_01_sfnt_off00006e32.bin
7b23a1e89cbb3c7974cec1b7fa0dc48f60d09e365cbbb3e1e4533812d7ca769f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E32 10376 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.