Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec9f0730ff12a3a…

MALICIOUS

PDF

45.2 KB Created: 2020-08-12 02:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae1b92c8f317b680987cfff008f6b765 SHA-1: b5c7229c37a9e34da013c822c7511eda3493272e SHA-256: eec9f0730ff12a3aaa15cdd78c80a4305df9d3ebe08262a64ef43669a5143b5a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the search query "Bohemian rhapsody partitura guitarra clasica pdf", suggesting a lure to disguise the malicious links. The ML classifier also strongly indicated 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.ru/pify?keyword=bohemian+rhapsody+partitura+guitarra+clasica+pdf
    • http://files.coastalcruisetravel.com/uploads/1/3/0/8/130814169/zonisa.pdf
    • http://files.sipndipwithjeanine.com/uploads/1/3/1/4/131453034/5833379.pdf
    • http://files.tecumsehbakery.com/uploads/1/3/0/7/130738903/396e9b4b8684.pdf
    • http://files.andyreimanis.com/uploads/1/3/1/0/131069887/567d2edfe6e.pdf
    • http://files.eagleriverbestcleaningservice.com/uploads/1/3/1/4/131453114/eb12e36f192.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/list_of_strong_acids.pdf
    • https://cdn.shopify.com/s/files/1/0452/7416/9505/files/nobobexoloralorisa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0358/files/bible_commentary_on_romans.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/autonomous_vehicle_system_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0434/7923/6773/files/puledugulonasoporeliwov.pdf
    • https://cdn.shopify.com/s/files/1/0431/6508/9941/files/git_permission_denied_publickey.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/jejakatofizaxomikilejovi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/38712280823.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/fesedovivodepuxaba.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/garebus.pdf
    • https://cdn.shopify.com/s/files/1/0434/2166/3397/files/58518268620.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_off000060d4.bin
f93da12251aeaca69f1a725e4c292072457cb084faf674bca4008c70af80c96b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D4 5720 bytes
font_01_sfnt_off00007424.bin
e9d88298f976d49735e1088c84378fe798c89212319a366aef1faf561128e5d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7424 15708 bytes

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