Malicious PDF — malware analysis report

Static analysis result for SHA-256 75fbb1e18e1fa3bb…

MALICIOUS

PDF

32.3 KB Created: 2020-08-10 03:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 642602d58acc552304d6199612e0aced SHA-1: 95cfa0736a5b5fc1d8804c221289fbc45d1a4865 SHA-256: 75fbb1e18e1fa3bb63e4d71e795641a9d3dc836bbcd09c70623d6790e0ae1f6d
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, masquerading as a book PDF, with a primary malicious redirector URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the link https://ttraff.ru/pify?keyword=morgan+anaesthesia+book+pdf is part of known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic further supports that this document is designed to host numerous links, likely for SEO poisoning or to distribute malware through a link farm. 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=morgan+anaesthesia+book+pdf
    • http://files.lusage.org/uploads/1/3/1/3/131398504/6837179.pdf
    • http://pokiba.plymouthopsoc.co.uk/uploads/1/3/0/7/130775432/magoz.pdf
    • http://sitarosu.zontaclubofredlands.org/uploads/1/3/1/4/131437736/mokekedepefalikol.pdf
    • http://files.onepurelove.org/uploads/1/3/1/4/131408100/nubevurozoxejibet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/menutupefex.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6324/files/73336314312.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/54831404453.pdf
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/rokizizenuvijuxekejadawe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/kuzilodelemovojedazigejor.pdf
    • https://cdn.shopify.com/s/files/1/0437/1379/0106/files/creative_chordal_harmony_for_guitar_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60868594071.pdf
    • https://cdn.shopify.com/s/files/1/0428/9062/5191/files/gitazemepolowobowe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/autoionization_of_water.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/fiwimikubutunipawasos.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_off0000422d.bin
0c6aa450f93144fd7ddfa30d51433cfb5c9f6972a26a81b5103180999ad895fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x422D 5480 bytes
font_01_sfnt_off000054d0.bin
171fb3493883b99bf059a8dc1f8d3f9eceb174dc674133fae67483a1b8623032		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54D0 9404 bytes

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