Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8116e47dc7592f…

MALICIOUS

PDF

45.6 KB Created: 2020-08-14 08:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb3b7e5052aeff1597164191e3b90190 SHA-1: 83e57baa39290cde7a087ffee4535d630c55d6c6 SHA-256: 2a8116e47dc7592ff48f626d1d49b2d47154f5842e4f9a979a56609d2bb236c8
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but also includes a critical link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=demonstrative+worksheet+grade+5'. The document body, though partially corrupted, suggests a lure related to a 'demonstrative worksheet grade 5'. This indicates the PDF is likely used to redirect users to malicious content or phishing sites. No scripts were extracted from this sample.

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=demonstrative+worksheet+grade+5
    • http://files.mistressmaryhell.com/uploads/1/3/0/7/130738593/titodubovorisenoxofu.pdf
    • http://files.strawberrymooncounselling.com/uploads/1/3/1/3/131397934/zemigasiletopusobit.pdf
    • http://files.urpeaceofmind.com/uploads/1/3/0/7/130776449/bumanepe.pdf
    • http://files.khalidshadid.com/uploads/1/3/1/1/131164520/9774432.pdf
    • http://wojumabe.shenangofire.com/uploads/1/3/1/3/131380081/4386768.pdf
    • https://cdn.shopify.com/s/files/1/0433/5439/0687/files/14770537274.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5503/files/kejifofon.pdf
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/xudusireduj.pdf
    • https://cdn.shopify.com/s/files/1/0433/9931/5610/files/scout_medical_examination_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/xezagexugadotifibisa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8607/files/79300948879.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/59279772086.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/xunumuxaxetojalasilaxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5542/3383/files/juwuretulilogozate.pdf
    • https://cdn.shopify.com/s/files/1/0431/9261/5073/files/us_history_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8761/8463/files/cisco_basic_networking_concepts.pdf
    • https://cdn.shopify.com/s/files/1/0436/4160/2198/files/ds3_door_shield.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/jefadanawifozozifema.pdf
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/divinity_original_sin_2_black_screen.pdf
    • https://cdn.shopify.com/s/files/1/0434/3418/0769/files/verefokasovok.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_off00006692.bin
8d8a94f934f95e2056668ee22db078ef6b3c161b9fea11d8abfe6f911d40bdda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6692 5332 bytes
font_01_sfnt_off00007899.bin
7d1af98e464448c38ac363ad27822fd178114f56bacf7846db8ec56d91459e44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7899 10028 bytes
font_02_sfnt_off00009af5.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF5 4324 bytes

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