Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d37f00c34fec50b…

MALICIOUS

PDF

42.8 KB Created: 2020-08-06 18:39:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 773cd458878614d9c618ef79a8a62979 SHA-1: 936f82e1b327cb352841ded9dbe70f0eb10d5d70 SHA-256: 3d37f00c34fec50b33f0745f86cc05574ed446837fa4a8918bc07582ad323e08
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify'. The document body, though heavily obfuscated, contains the same URL and a reference to 'java tutorial for beginners bangla pdf', suggesting a lure. The PDF also exhibits a link farm behavior, with numerous links pointing to Shopify domains, likely for SEO manipulation to increase visibility of the malicious content. No scripts were extracted from this sample.

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=java+tutorial+for+beginners+bangla+pdf
    • http://files.stephtalksfood.com/uploads/1/3/1/4/131438036/webadagogelabe.pdf
    • http://files.sjamediaarts.com/uploads/1/3/1/4/131409761/a13a3a4fcec230.pdf
    • http://files.shefaholistic.com/uploads/1/3/1/1/131163902/gimonimewog-napabef-madupux.pdf
    • http://files.blackgoldwinterguard.com/uploads/1/3/1/3/131398406/monaduloxesejaw-rilupojakotun-masereg.pdf
    • http://files.ajcollectablecards.com.au/uploads/1/3/0/7/130738531/625421.pdf
    • https://cdn.shopify.com/s/files/1/0437/3102/6071/files/sezopolaror.pdf
    • https://cdn.shopify.com/s/files/1/0429/2562/1404/files/etw_civil_war_mod.pdf
    • https://cdn.shopify.com/s/files/1/0436/4887/6702/files/bistro_romain_carte.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/free_caterpillar_service_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/74995187635.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/31519373572.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/61202540179.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/lidepasikepizewu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2876/7143/files/sekafaweka.pdf
    • https://cdn.shopify.com/s/files/1/0440/8783/6822/files/celebrate_jesus_celebrate_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/68756152358.pdf
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/acopio_de_informacion_metodologia.pdf
    • https://cdn.shopify.com/s/files/1/0428/2194/3463/files/20288179063.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a28.bin
05401121348df87230d34f7d308eed57f67ed4b336c3318e5645776af8370ffd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A28 5280 bytes
font_01_sfnt_off00005c22.bin
8ea2eb6562d57f819a38bedcde283f50d788b0f16031d799f5779690e84ec8ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C22 5424 bytes
font_02_sfnt_off00006de7.bin
e961ebdafc283d537ee83c8d1d3c046c8f6644b4bf4a3c21bf8e2b5240a53d7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE7 9812 bytes
font_03_sfnt_off00008f86.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F86 4324 bytes

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