Malicious PDF — malware analysis report

Static analysis result for SHA-256 5592f09ebb20f781…

MALICIOUS

PDF

42.2 KB Created: 2020-08-20 13:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b01d7a8f7c82b7b2a51b6fe73e11cf6 SHA-1: c17a397a1d98138ba1ef58f079941df0e67762ff SHA-256: 5592f09ebb20f78118f0b3559b363ac5c9e23315b3dea1f11a8a9b7251615158
150 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=weekly+schedule+template+24+hour', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and references a 'weekly schedule template 24 hour', suggesting a lure to disguise the malicious intent. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the primary malicious destination.

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=weekly+schedule+template+24+hour
    • http://files.drdom.com.au/uploads/1/3/2/7/132740408/zerosezawob.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/gawininosidim.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/python_flask_template_if_statement.pdf
    • https://cdn.shopify.com/s/files/1/0430/3391/9645/files/20649327791.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0862/files/noloxiru.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/35601562850.pdf
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/53447499664.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/52193925706.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/juxumadebamapetutorobegew.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_off0000674f.bin
3c686e876ec0a6dded9c98f7ced239d0c128fb5914347e3d301a19f60e6d5dfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x674F 5712 bytes
font_01_sfnt_off00007ab8.bin
538c3f5d252739ff54d5d4083a09b5a1e6c535c38a362591b1256aa74c81ae6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB8 9884 bytes

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