Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb3e7af3a3e18a4…

MALICIOUS

PDF

50.2 KB Created: 2020-07-20 20:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c80c6ee18d14bf6738598e5495b61dc7 SHA-1: 4d09fd796cb8c68581e72a4f8301d27dfeefd0fd SHA-256: edb3e7af3a3e18a4d13ed05881ca3fe4a13baa53f5e9bd05465243817d9f8fe7
152 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm. Specifically, it links to a known malicious redirector at 'ttraff.cc' and a large number of PDFs hosted on Shopify, suggesting a coordinated effort to distribute malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the embedded links are the primary attack vector.

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/wb?keyword=exemple%20d
    • http://files.tegnadesigntank.com/uploads/1/3/1/4/131437491/nuvonobudelizowogot.pdf
    • http://files.atimeofmyown.com/uploads/1/3/0/9/130969831/melejemefigutit.pdf
    • http://files.c3industriesllc.com/uploads/1/3/0/7/130776726/xufadujedus.pdf
    • http://files.corealis-ing.net/uploads/1/3/2/8/132814448/24ac7.pdf
    • http://files.corealis-ing.net/uploads/1/3/2/8/132814448/24ac7
    • https://cdn.shopify.com/s/files/1/0431/8127/7345/files/novosumezaged.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9389/files/50577188877.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43106273748.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5153/files/mututijojawi.pdf
    • https://nogomexowe.files.wordpress.com/2020/06/61121698739.pdf
    • https://masobovixapa.files.wordpress.com/2020/07/99452594187.pdf
    • https://japifefig.files.wordpress.com/2020/06/xutenumoniloboxosose.pdf
    • https://cdn.shopify.com/s/files/1/0434/2664/4125/files/tetoxefegidikikaliter.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/gaveradoremobu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0062/6341/files/9700386251.pdf
    • https://cdn.shopify.com/s/files/1/0435/3854/6840/files/lerowufogadavif.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/majojatugogimetozuxotubel.pdf
    • https://cdn.shopify.com/s/files/1/0432/6224/7080/files/68741750988.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32177526878.pdf
    • https://cdn.shopify.com/s/files/1/0434/6894/7616/files/lisezamobop.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_off00007bdb.bin
37d22d4d76af380543482262f4e37cee9deb9d431e3991807f284e3926fe2b82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDB 5028 bytes
font_01_sfnt_off00008ce2.bin
04cd6dc3138cbe4297e95596a8af592cbe34ca5e4c7445386abf3537bd505663		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE2 14932 bytes

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