Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac12aa4c038b1fd7…

MALICIOUS

PDF

57.4 KB Created: 2020-08-21 01:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d89903378de8c304346590857609d8a SHA-1: f70149036d5464f8e1e8aa298df832e42378620b SHA-256: ac12aa4c038b1fd761f0cbfe46e8cd925e3b9087fc97eabeb536a759c250ef17
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 'https://ttraff.ru/pify?keyword=moonkin+pvp+guide+8.+0.+1'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'https://cdn.shopify.com/s/files/1/0437/0874/3834/files/varabowowuma.pdf' being a prominent example. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the redirector URL, suggesting a lure to a malicious site.

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=moonkin+pvp+guide+8.+0.+1
    • http://files.marigoldstoys.com/uploads/1/3/0/8/130813906/713851.pdf
    • http://files.panzyler.com/uploads/1/3/2/7/132712306/8878824.pdf
    • http://files.onelightinstitute.org/uploads/1/3/2/8/132814241/283b245e4f.pdf
    • https://cdn.shopify.com/s/files/1/0437/0874/3834/files/varabowowuma.pdf
    • https://cdn.shopify.com/s/files/1/0429/0225/7823/files/xixupotidepesoluke.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2316/files/lapefisalinopakilofeko.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/faa_form_8710_13.pdf
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/80216362930.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/8330/8955/files/jeneriravipadizu.pdf
    • https://cdn.shopify.com/s/files/1/0456/9146/9983/files/filmywap_2017_movies.pdf
    • https://cdn.shopify.com/s/files/1/0450/3034/2806/files/convert_small_to_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0432/5005/7373/files/year_at_a_glance_calendar_template_excel.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_off0000a4a3.bin
81a579da67297a9aec514dc7f9c8b44a1d6b4c5cbd0342742ab33c7aeddc22d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4A3 5160 bytes
font_01_sfnt_off0000b668.bin
f56cb80a675538c08eb184f2723ac62a66004607ab27ca73082898130953a03c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB668 10004 bytes

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