Malicious PDF — malware analysis report

Static analysis result for SHA-256 af70869885cbe8d7…

MALICIOUS

PDF

44.5 KB Created: 2020-08-19 18:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e578514ce135c66820b9aaa0d908ce0 SHA-1: 1ac5541e42232aff7f2937fcae499b71234dfa16 SHA-256: af70869885cbe8d7fd092d03c741a20a89c1dd94b16e3ac87d897868a5ca899c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on Shopify but point to a suspicious redirector URL. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the primary link leads to known malicious infrastructure. The document body, though heavily obfuscated, contains the suspicious URL and text suggesting a lure for educational content. The overall pattern suggests a link-based phishing or malware distribution attempt.

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=farm+animals+worksheets+for+preschoolers+pdf
    • http://files.vermontsingingdrum.com/uploads/1/3/0/8/130874485/2823064.pdf
    • http://files.statisticsfromatoz.com/uploads/1/3/2/8/132815298/cb1295cc.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/fejaravogubudon.pdf
    • https://cdn.shopify.com/s/files/1/0437/9721/7440/files/noise_risk_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0433/0618/8955/files/10534272636.pdf
    • https://cdn.shopify.com/s/files/1/0432/4504/3880/files/exercises_verb_to_be_simple_past.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xozujegemuzudileruzodedus.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2906/files/asp_baton_training.pdf
    • https://cdn.shopify.com/s/files/1/0429/2286/8892/files/91297239447.pdf
    • https://cdn.shopify.com/s/files/1/0439/9045/0334/files/sap_data_services_4._2_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0429/6232/1567/files/academy_of_management_executive.pdf
    • https://cdn.shopify.com/s/files/1/0429/3433/7695/files/momuzolaturubisomog.pdf
    • https://cdn.shopify.com/s/files/1/0430/6147/7527/files/40717831569.pdf
    • https://cdn.shopify.com/s/files/1/0437/4118/4165/files/fajesowivelisunulikuxeliw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061d8.bin
72a6fe7f8a413d55096ffee3c409dfb7d91b44af1f1bacf598c13f4a877429a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D8 5296 bytes
font_01_sfnt_off000073b7.bin
e656ebd01eb53bd2b617e2f251b63d8e25c0cb029e175eceb4f4b49c4ce4a78f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B7 10352 bytes
font_02_sfnt_off00009710.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9710 4324 bytes

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