Malicious PDF — malware analysis report

Static analysis result for SHA-256 226122a3b67bc6bc…

MALICIOUS

PDF

46.8 KB Created: 2020-08-03 14:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39b518f4f67dfe93b56acc67cd1ab895 SHA-1: ccdcb0bf986748fb6266632541098048af2b7c0b SHA-256: 226122a3b67bc6bc1fc2fe472aa1cdf3d7cff18e696ee3ca9034eff55f464028
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, many pointing to a link farm hosted on Shopify, designed to obscure the ultimate destination. The primary link, 'https://ttraff.cc/pify?keyword=how+to+create+a+book+pdf+file', is identified as a malicious redirector. This suggests the document's purpose is to lure users into clicking malicious links, likely leading to further compromise. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=how+to+create+a+book+pdf+file
    • http://files.fromtheboulevardtoday.com/uploads/1/3/1/4/131483955/2840376.pdf
    • http://files.smileysjoy.com/uploads/1/3/1/3/131381679/5cd02de.pdf
    • http://files.freedomachine.com/uploads/1/3/2/6/132696263/858664.pdf
    • http://files.thebottomdrawerantiques.com/uploads/1/3/2/6/132681394/206e912edb8.pdf
    • http://files.yourmoneytravel.com/uploads/1/3/1/4/131408062/dedca72fd8d997.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/labawazomuvamitowejenaki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57955619809.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/nopobebedizebaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/40350395065.pdf
    • https://cdn.shopify.com/s/files/1/0435/9490/7810/files/lunavefiwemebulirilubinux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/32851444867.pdf
    • https://cdn.shopify.com/s/files/1/0428/6133/0598/files/how_to_install_forge_1._12._2.pdf
    • https://cdn.shopify.com/s/files/1/0430/5394/0887/files/94442689582.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/kazeguxakawavuzuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6915/3181/files/wagomumosanejakufuduga.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_off000079e2.bin
6a30e2a32a0876501291e30560b1f0e7238ce8ce1569c399e011184764c87282		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E2 5228 bytes
font_01_sfnt_off00008bc6.bin
3ec58e57c122a46e4b8d5c8df58518162ce4ff116fc321196fad4ba605d8f5fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC6 10004 bytes

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