Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5851e06ecb981b…

MALICIOUS

PDF

61.3 KB Created: 2020-07-31 23:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bffcb91e764f56df8b5458daff262284 SHA-1: 7b2cb3b081fd8bb8c1c30ba8013f5c6acad9eb43 SHA-256: de5851e06ecb981b5a4e2e84e8e2a688e074f64fc57c4ec94cc2258229cabb5f
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=hive+druid+integration', which is flagged as malicious. Another URL, 'https://cdn.shopify.com/s/files/1/0430/2651/4077/files/21047500319.pdf', is also present and appears to be part of the link farm.

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=hive+druid+integration
    • http://files.gatewaycathedral.com/uploads/1/3/1/4/131453214/diloroxiwefudadav.pdf
    • http://files.sandrawadkin.com/uploads/1/3/1/6/131606346/supeluveze.pdf
    • http://files.thefictionwritersjourney.com/uploads/1/3/1/3/131383648/c074b6b0e3.pdf
    • http://files.flyingleapimprov.net/uploads/1/3/1/4/131407691/236ba8dfb3aa2.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/21047500319.pdf
    • https://cdn.shopify.com/s/files/1/0428/7725/5836/files/nofava.pdf
    • https://cdn.shopify.com/s/files/1/0433/8063/7861/files/fivaditivubawo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3674/files/tivovufid.pdf
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/40876443440.pdf
    • https://cdn.shopify.com/s/files/1/0430/0265/8979/files/88503294770.pdf
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/19666392853.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/28614121194.pdf
    • https://cdn.shopify.com/s/files/1/0437/8663/3374/files/47119208875.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/ravujopek.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_off0000a492.bin
0983c11ceafa62a40101bd8b67cbe44bd462afe6b79fae7ae01abc1dfd906720		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA492 4804 bytes
font_01_sfnt_off0000b4fc.bin
347edbf5efc2bd6e6dac12b8994fbc13a81c72bf5f7417a0c28ab2b79f4d6237		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4FC 16484 bytes

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