Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8f79b0df47ba6a…

MALICIOUS

PDF

32.9 KB Created: 2020-08-12 07:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6682f965bcac1dc7803523801580afa9 SHA-1: 5ac6a0a208e23bd64aa9955c59fa40790cce78ff SHA-256: 9f8f79b0df47ba6a73ad99ebd256fbd7d8d90c5555f7967b378e792c620dc717
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links redirects to a known malicious infrastructure at 'ttraff.ru'. This suggests a link farm or SEO poisoning technique used to distribute malicious content or conduct phishing. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wb?keyword=half%20penny%20farm%20menu%20pdf', reinforcing the malicious redirector intent.

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/wb?keyword=half%20penny%20farm%20menu%20pdf
    • http://files.lavenderwrapswholesale.com/uploads/1/3/1/4/131406935/7026001.pdf
    • http://files.metropolitanperformingarts.org/uploads/1/3/2/8/132814286/17496.pdf
    • http://files.ashleyowens.shop/uploads/1/3/1/4/131483254/35b2ae9e6.pdf
    • http://files.molecularultrasound.com/uploads/1/3/0/8/130874143/dovutevebasinerin.pdf
    • http://files.518nextlevel.com/uploads/1/3/1/3/131384249/bawam.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3133/files/81130108894.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/29906856562.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/zodijepixonerosawugumepa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5548/0981/files/10798691908.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/subifef.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/whirlpool_cabrio_platinum_dryer.pdf
    • https://cdn.shopify.com/s/files/1/0434/4233/9992/files/ramab.pdf
    • https://cdn.shopify.com/s/files/1/0429/6232/1567/files/cabin_in_the_woods_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/0881/1427/files/oath_cher_lloyd_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/nitefetosogajelowu.pdf
    • https://cdn.shopify.com/s/files/1/0448/5254/3649/files/idylis_416709_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/zisowitika.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_off00004652.bin
5a63d7bf7133544bd2d4303942c491c03174787a184a8228ebc415105088d1db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4652 5072 bytes
font_01_sfnt_off00005787.bin
cc9c57d42b145e5f40ef2408622621d2fb7e3bc84910b7e4e83ad6b4390ade4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5787 9172 bytes

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