Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb64d7390291e8d9…

MALICIOUS

PDF

43.0 KB Created: 2020-08-04 05:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09bbd5258c928b6ed9fc175fc08c6821 SHA-1: 4c82ee7568e69ecc97da36d4ab5557ae2f9a4378 SHA-256: bb64d7390291e8d973c3ec283b1b55cd2baa0d52b821c3e54124ff1d69cf9a9c
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link 'https://ttraff.com/pify?keyword=important+terms+in+accounting+pdf' leads to known malicious infrastructure. The 'SE_INVOICE_LURE' heuristic suggests the document's content is designed to trick users into clicking the link by appearing as an invoice or important document. The presence of numerous other links, identified by 'PDF_SEO_LINK_FARM', further supports a malicious intent to distribute harmful content or engage in SEO abuse.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=important+terms+in+accounting+pdf
    • http://files.melaniebartelart.com/uploads/1/3/1/0/131069890/5621904.pdf
    • http://files.istudentsduke.org/uploads/1/3/1/3/131379296/beraruvumifivenab.pdf
    • http://files.berrysleek.com/uploads/1/3/1/4/131437117/6148322.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/27807241986.pdf
    • https://cdn.shopify.com/s/files/1/0431/3989/1357/files/computer_awareness_book_free_download_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/1796/0600/files/deberobisezemakudigufa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/10390249226.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/litigod.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/rezubiwamefe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6583/files/jidomubataxup.pdf
    • https://cdn.shopify.com/s/files/1/0428/1348/9318/files/fanotu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0300/files/97613385117.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/wozugekimazujivadarixebin.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/51873843182.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/mariner_15_hp_outboard_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/kugolekitotulugeg.pdf
    • https://cdn.shopify.com/s/files/1/0436/5425/0654/files/the_seven_chakras_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/69138800175.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_off000068c6.bin
d724ab39ad449d47d6cc138e2d97f7c529ccf1636de7cab5d1e6ce83283f6c6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C6 5380 bytes
font_01_sfnt_off00007af5.bin
4ab48572f833ca3c9bebb9aa01c0ce027f59fbbc420e8881621a73d02c2feac8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF5 10436 bytes

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