Malicious PDF — malware analysis report

Static analysis result for SHA-256 8297037f5dcfb285…

MALICIOUS

PDF

41.8 KB Created: 2020-08-22 11:38:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53aa42e9d206714e40513cedfbd64a97 SHA-1: b0866e98e5834a4b948912c16e39f691b9e09879 SHA-256: 8297037f5dcfb285f050596d85551436c4f87e382772d5b75c5d4c8b88debaae
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, constituting a link farm. One of the primary links directs to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious payload. The document body itself is heavily obfuscated and contains the same malicious URL, further reinforcing the malicious intent. No scripts were extracted from this sample.

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.ru/pify?keyword=infection+control+risk+assessment+template
    • http://juwinaza.nctreasurechest.org/uploads/1/3/1/3/131398140/8929553.pdf
    • http://files.mosaicjusticenetwork.org/uploads/1/3/1/3/131380569/8301207.pdf
    • http://files.rbc-l.com/uploads/1/3/1/4/131438557/d66ea2ed85.pdf
    • https://cdn.shopify.com/s/files/1/0430/6354/1917/files/stolen_innocence_jan_broberg_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43106273748.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/nabawotedafonolovobeja.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/esl_worksheets_for_beginning_adults.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4885/files/82569754801.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/tomobizitebedibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/bozeruxezozagerusix.pdf
    • https://cdn.shopify.com/s/files/1/0431/6663/0050/files/dnd_5e_incapacitated.pdf
    • https://cdn.shopify.com/s/files/1/0448/1181/3015/files/32914514006.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50306279194.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_off000066a3.bin
a642dc0513969650da0806223b09bf3d5104bcaff95f613830942ed861c46397		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A3 5160 bytes
font_01_sfnt_off0000781a.bin
db76458dbed28455f7e6972671b616b5146dcd252308033c4bfca42b0531f5c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x781A 10012 bytes

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