Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df18abb52b977bc…

MALICIOUS

PDF

54.1 KB Created: 2020-07-29 03:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ff9d805cb29c770e147483212673c4c SHA-1: c329b04b3b0d0b5976122c8fc4ea9fbbcac0bb26 SHA-256: 1df18abb52b977bce24c59d6bbbb585218e7f18c38accdcc55b290de06d7dc47
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicating a link to a known malicious redirector. Another critical heuristic, PDF_SEO_LINK_FARM, highlights the presence of a mass external PDF link farm. The document body itself appears to be largely obfuscated or contains metadata rather than user-readable content, but the presence of these links strongly suggests a malicious intent to redirect users to harmful sites.

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=structure+of+higher+boranes+pdf
    • http://files.thevinenyc.org/uploads/1/3/1/4/131455956/bavupexerepu_kodopig_jagakid_nipewer.pdf
    • http://files.mjsastro.com/uploads/1/3/1/3/131381363/tilejugoxeb_novexelunobuwa.pdf
    • http://files.beckydolleycpa.com/uploads/1/3/1/6/131606046/591554.pdf
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/naxujus.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/28068970705.pdf
    • https://cdn.shopify.com/s/files/1/0434/6760/4128/files/13680997792.pdf
    • https://cdn.shopify.com/s/files/1/0438/0937/4365/files/83985669485.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/kiniwujevage.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/pivozofoxuxubufinukuba.pdf
    • https://cdn.shopify.com/s/files/1/0435/6784/1443/files/sikutogodututerawa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/82347868375.pdf
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/riwewamovonu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6114/9850/files/89458469980.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/38467634027.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_off00009260.bin
bce2d46c16151c8517d1adc91bc472b20b5fdc3b26ca9d1bad55d1ce57d5f1d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9260 5508 bytes
font_01_sfnt_off0000a503.bin
c9930d3c85306def94129b0216580df14fa42c935ae66b53b5f858611c449c83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA503 11136 bytes

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