Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e977337dd66525…

MALICIOUS

PDF

42.6 KB Created: 2020-08-11 02:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bcf405e2d41eaaaee525a5fcd83dc1c SHA-1: b90cb43844d30fd0a3ebc50567d1539d79f84378 SHA-256: 84e977337dd66525d2d37ae2a50be6bff4f8d787cced08b403eb93a5388d9cad
150 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which is a common tactic for distributing malware. The document body and embedded URLs suggest a lure related to academic material, likely to trick users into downloading a malicious file. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=calculus+and+analytic+geometry+pdf+by+m.+n.+m+talpur
    • http://files.livingwatersapostolic.com/uploads/1/3/1/4/131482931/255b43e3bb18.pdf
    • http://wifop.patriothallsc.org/uploads/1/3/2/7/132740405/4244205.pdf
    • http://files.johnphilliposborne.com/uploads/1/3/1/3/131379325/godegupeva.pdf
    • https://cdn.shopify.com/s/files/1/0437/1991/7717/files/pajed.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/35687499284.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/ramexewiwewesuwedagiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4859/8678/files/10715894294.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/bivosek.pdf
    • https://cdn.shopify.com/s/files/1/0432/4202/9224/files/56289562207.pdf
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/lopam.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/sql_injection_tutorial_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3103/5032/files/kurabo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3022/files/15289571286.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/aggregate_demand_and_supply_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0429/3695/9139/files/wusazevuzijegiv.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_off00006685.bin
20901ede4dd6cbe53c1262a8c7f3e13c25f96acfee7b2e9aee49fee339a12c83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6685 5656 bytes
font_01_sfnt_off000079ac.bin
9cd90c726d316b88f8d02fc1372a872cb42bfa544932f20fbf264811300b915b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79AC 10420 bytes

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