Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd8fc00ddc2c1a46…

MALICIOUS

PDF

44.0 KB Created: 2020-08-17 05:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d9d3926235edfc52efbe72daabf7b6e SHA-1: 3cb265809303c50bbdd6b04d2ca22c633a8955db SHA-256: fd8fc00ddc2c1a461f8c923476339c519fd50d4c963d6d3f47441752c2a458bd
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, masquerading as educational material. One of the primary links, 'https://ttraff.com/pify?keyword=fraction+to+decimal+to+percent+worksheet+pdf', is identified as a malicious redirector. This suggests the document's purpose is to lure users to malicious infrastructure by presenting itself as a helpful worksheet.

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.com/pify?keyword=fraction+to+decimal+to+percent+worksheet+pdf
    • http://files.annetate.photo/uploads/1/3/2/6/132681625/tozoso-mejiwasusanupe-romubilisezu.pdf
    • http://lupaponum.countrygirlcustoms.com/uploads/1/3/0/7/130740178/gerarasowemawoga.pdf
    • https://cdn.shopify.com/s/files/1/0449/2935/1835/files/jixow.pdf
    • https://cdn.shopify.com/s/files/1/0429/1536/5031/files/36046970231.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2102/files/85876122062.pdf
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/27967404965.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2245/files/59938509726.pdf
    • https://cdn.shopify.com/s/files/1/0437/5268/5717/files/pdf_xchange_viewer_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0428/6201/8716/files/university_physics_14th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/1710/7618/files/zopuriboraxawavoxifixagab.pdf
    • https://cdn.shopify.com/s/files/1/0434/5295/6838/files/jotexeropekovirax.pdf
    • https://cdn.shopify.com/s/files/1/0451/1848/8741/files/a_smartwatch_to_read.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_off00005fd6.bin
6766cee887a2fc03cfaa8f78854bc8a47f9046c2a9502601d2bf2b7f648efacf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD6 5296 bytes
font_01_sfnt_off000071b3.bin
ff2b2ee9358f375a890fea16240735ad4032cec097605c4565dc0a37d4a95b01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B3 10352 bytes
font_02_sfnt_off000094fd.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94FD 4324 bytes

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