Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb277447468ba11…

MALICIOUS

PDF

47.4 KB Created: 2020-08-10 17:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8eb0f6d5055f576367884991358e3cde SHA-1: 5b09bdfbe8be4354ddc30ab68a46bdfb169eefb2 SHA-256: 1bb277447468ba1162fd9853c1ec229edc9ea3c1c5bed3f610749e4c4070cb2f
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to mimic academic content. This suggests a social engineering attack aiming to redirect users to potentially harmful sites, likely for phishing or malware distribution.

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=rhetoric+logic+and+argumentation+pdf
    • http://files.gretelparker.com/uploads/1/3/1/4/131409244/kebisafimuxeta-lepejeg-nemikixa.pdf
    • http://birar.wilsonhypnotherapy.com/uploads/1/3/2/6/132682646/zibubif.pdf
    • http://munoza.elainecairneyhomeopathy.com/uploads/1/3/2/6/132683071/4908548.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8487/files/stewart_multivariable_calculus.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/84671145283.pdf
    • https://cdn.shopify.com/s/files/1/0433/4940/9960/files/alphabet_hebreu_francais.pdf
    • https://cdn.shopify.com/s/files/1/0433/7618/1398/files/weather_saginaw_mi_10_day_forecast.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/gipatuxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/wamoxegufeginakuxawumoz.pdf
    • https://cdn.shopify.com/s/files/1/0436/4327/3369/files/64193546858.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/talenolujewupaxowixalese.pdf
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/jiritanokujafapoxuxisuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/12461465998.pdf
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/supapap.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3369/files/88057591760.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/fuwofab.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_off00007a61.bin
23574a401d210cd5a08df12f61d6edf0354a93be511c27057bbfb6d75001eec2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A61 5400 bytes
font_01_sfnt_off00008c97.bin
7879b31e37814fd13ec7023bf0252b3d9b7efd670ff57d50fcba3692bda3c3c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C97 10592 bytes

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