Malicious PDF — malware analysis report

Static analysis result for SHA-256 5690cabd3502263e…

MALICIOUS

PDF

51.7 KB Created: 2020-08-23 15:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cea6a25a99c3c0e403670fc30886731 SHA-1: 87b94ca1fc9342e722a63eaa6da891b32580c16d SHA-256: 5690cabd3502263efe96a0fb9ce572b490441ab34ccee75be592b7835456f146
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, many of which point to external PDF files hosted on various domains, including Shopify. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=occurrence+at+owl+creek+bridge+text+pdf'. This suggests the document is part of a link farm or SEO poisoning campaign designed to direct users to malicious infrastructure. 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=occurrence+at+owl+creek+bridge+text+pdf
    • http://files.brasasperu.com/uploads/1/3/1/4/131482887/vusikiba_wugodokojiga_xodewabux.pdf
    • https://cdn.shopify.com/s/files/1/0463/2300/7645/files/domodudiribuxagido.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9288/files/29563768672.pdf
    • https://cdn.shopify.com/s/files/1/0435/0584/4390/files/big_fish_games_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/powarojezufusu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/39636202744.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/rubirekidelaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/8309/5452/files/strengthening_exercises_for_shoulder.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/52771076818.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/xfdl_to.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9756/files/52477930789.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_off00008b93.bin
e4d9bf4a7ddbcb434f7cf6c2b4baecdfcdf95c7f61cf82f496e0216e9a8d9dd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B93 5536 bytes
font_01_sfnt_off00009e8f.bin
1acf22b8d0ed1060a3055c94b4422e462ef9f35e15a41cc5fb2ffeff61f2362e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E8F 10392 bytes

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