Malicious PDF — malware analysis report

Static analysis result for SHA-256 de66210e7b43701e…

MALICIOUS

PDF

43.0 KB Created: 2020-08-10 02:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae7da33a010c49ad3d25f792bf158045 SHA-1: d4875a8b9389b25243f14c69ff737f8506685130 SHA-256: de66210e7b43701e1642d26afa7547f22071b43686ee5732b694335a21285977
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=variable+valve+timing+intelligent+system+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure.

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=variable+valve+timing+intelligent+system+pdf
    • http://files.infinityequestrian.com/uploads/1/3/1/6/131606815/zutalisugi_benexeseje_weziwe.pdf
    • http://files.niwotcounseling.org/uploads/1/3/1/1/131164202/426cec486e.pdf
    • http://files.sklallamwarriors.com/uploads/1/3/2/7/132740905/pafajajofapan.pdf
    • http://files.dvgradnight.com/uploads/1/3/0/7/130740049/mobubumonakidex.pdf
    • http://files.koolauloacalendar.org/uploads/1/3/1/4/131407284/3693f.pdf
    • https://cdn.shopify.com/s/files/1/0428/3272/4124/files/plant_embryo_development.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8080/files/gadexuga.pdf
    • https://cdn.shopify.com/s/files/1/0438/7107/6520/files/fipoxutixigebekemib.pdf
    • https://cdn.shopify.com/s/files/1/0438/6127/8870/files/94860073940.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/html5_canvas_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78549170372.pdf
    • https://cdn.shopify.com/s/files/1/0433/4911/5029/files/pelil.pdf
    • https://cdn.shopify.com/s/files/1/0436/8180/8549/files/siva_engine_influx_capacitor.pdf
    • https://cdn.shopify.com/s/files/1/0431/6626/9600/files/95364724812.pdf
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/livro_de_neemias_hernandes_dias_lopes.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_off000066ee.bin
f55491cb61703357930a608fd7297f21ff132f3c722e4b39084b1c0c99b6cc05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66EE 5628 bytes
font_01_sfnt_off00007a08.bin
b25b3bd32dbdc245636222d49a26b62e086a10705286e6f0e423a38d5af8e614		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A08 11444 bytes

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