Malicious PDF — malware analysis report

Static analysis result for SHA-256 232385f14410a52f…

MALICIOUS

PDF

59.3 KB Created: 2020-08-08 19:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4f1b9f6012b51aad1f45cc675205fee SHA-1: c5e4deb684384bfa9eb7a8cc42ad2b21a30ad20b SHA-256: 232385f14410a52f6c5946fabc1ba462ea99e8073a8dfdbad79dec713af561fb
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=advance+excel+shortcut+keys+pdf+download', disguised as a free download for Excel shortcuts. It also hosts a large number of external PDF links, many hosted on Shopify, likely for SEO manipulation to increase visibility. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=advance+excel+shortcut+keys+pdf+download
    • http://files.ivlounge.com.au/uploads/1/3/1/4/131437330/97382ee29.pdf
    • http://files.valetridents.com/uploads/1/3/0/8/130874679/jowezedulopomasupif.pdf
    • http://batekewo.24hrtowingriverside.com/uploads/1/3/0/7/130776791/2231864.pdf
    • http://files.christinamarshalllmt.com/uploads/1/3/2/3/132302998/kedinirineveto.pdf
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/35481506884.pdf
    • https://cdn.shopify.com/s/files/1/0433/7218/3710/files/bank_po_exam_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/sovosazuzutememafoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/mimodej.pdf
    • https://cdn.shopify.com/s/files/1/0432/7358/4793/files/98878025625.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4679/files/53512464836.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/gobovibode.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/kubikobajagekifaziwofe.pdf
    • https://cdn.shopify.com/s/files/1/0434/2009/0535/files/jonadijopurikozukuwu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0212/6751/files/fofikazokiwat.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/fuzera.pdf
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/coyote_kisses_six_shooter.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_off00009dc7.bin
aa9933df1efd58a9613e3468779648adc808adee930cec039faed4503206250b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC7 5620 bytes
font_01_sfnt_off0000b0f9.bin
9d93f223ff6a83230c5aa59216f67cbc08441f358136968fd02be59dc276850d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F9 15248 bytes

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