Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d7cc7fef6f2677…

MALICIOUS

PDF

43.2 KB Created: 2020-08-31 18:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 505d70ff6122ab1008a1a77b181d7285 SHA-1: efc6ee5adff8062e59c92bdff9c93bc5edf3c1d2 SHA-256: 54d7cc7fef6f2677b0e47c5c377039c6a3db4d5f30edab9f1a86772837ad3801
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. This URL is presented within the document body, disguised as a search result for 'remove blank page from pdf in c#'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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/wix?keyword=remove+blank+page+from+pdf+in+c%2523
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/lirekokonise.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/pdf_editor_software_freeware.pdf
    • https://cdn.shopify.com/s/files/1/0437/3279/5541/files/fesuxuzewutufepixekuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6925/1487/files/pixufude.pdf
    • https://static.usrfiles.com/ugd/b65acf_ec0f5ad25f544546bfecf03b17bf980e.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/92809248444.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0078/files/negidoruborolituko.pdf
    • https://cdn.shopify.com/s/files/1/0434/4404/3943/files/tipesenosepi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/acrobat_reader_windows_8._1.pdf
    • https://static.usrfiles.com/ugd/f63f29_0dac4891c71a4ba1b9f4163e4cb4a319.pdf
    • https://static.usrfiles.com/ugd/22bf55_aafe439e141b40b58dd87ffeb4b1ad5b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005db9.bin
f22e4aeef2a79ce5e6628bd9c4cf359e72c938927ca5d996a200402c19df173e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB9 5276 bytes
font_01_sfnt_off00006f95.bin
7296910b5f6546072d81a2341390278ba64737f8a938308d6cd86355732d6f94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F95 10060 bytes
font_02_sfnt_off000091fa.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91FA 4324 bytes

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