Malicious PDF — malware analysis report

Static analysis result for SHA-256 e805378d75294215…

MALICIOUS

PDF

40.6 KB Created: 2020-08-18 19:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01ae96cf3d0c5ea26fab0e7cb1b1af2a SHA-1: d187198a73b91e5dc828c9bbc77acd41899b1a2d SHA-256: e805378d752942151dc80bb798fd6dbf2e78bc6cbe608d1799ab4a1d6a0d7501
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text related to 'free sheet music' and the malicious URL, suggesting a lure. The primary malicious URL, 'https://ttraff.cc/pify?keyword=free+sheet+music+choral+arrangements', is likely used to redirect users to a phishing or malware distribution site. The presence of multiple PDF links and the ML classification further support the malicious nature of this document.

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=free+sheet+music+choral+arrangements
    • http://files.floydhicks.com/uploads/1/3/0/9/130969809/1693e6339b.pdf
    • http://zuvurez.tzivelek.com/uploads/1/3/1/3/131380213/puren.pdf
    • http://files.sisterjane.org/uploads/1/3/0/7/130775921/tujopitefarini_wamimililotabuw.pdf
    • http://files.studiobeeproductions.com/uploads/1/3/2/6/132681698/e1722.pdf
    • https://cdn.shopify.com/s/files/1/0431/8068/7524/files/5861983401.pdf
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/easy_piano_songs_pop.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/50467210654.pdf
    • https://cdn.shopify.com/s/files/1/0440/4038/8758/files/bizapoferelavixuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2245/files/jajuvomakawowedozoxono.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/98581155259.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9969/files/taketofobugatub.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4712/files/comprehensive_outpost_construction_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/46263863542.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/xodepef.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_off00006101.bin
99a68b3adbb9d8de9a5d1e3d51be0d2f10d681afc6fa2edeea91bfcc350c8a22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6101 5168 bytes
font_01_sfnt_off00007272.bin
ace5ad7d2ae73d6e88b3340e4d8c3fc3abf7104c53e00d45d640836c77a16e2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7272 10352 bytes

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