Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5b4919630433db…

MALICIOUS

PDF

40.2 KB Created: 2020-08-14 20:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bf381571d055aa960c4083535ebf801 SHA-1: ba86f9ee4fa51b70b39919d8178d5e467dde4616 SHA-256: bd5b4919630433dba3f61b4185e554283e63881d2468933bf4dc54f3bf5ea9c4
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=youreporter+maltempo+brenta'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs hosted on Shopify. The document body, though heavily obfuscated, also contains the same malicious redirector URL and several Shopify-hosted PDF links. The primary intent appears to be directing users through a malicious redirector.

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.cc/pify?keyword=youreporter+maltempo+brenta
    • http://rikukeru.globalpassports.co.uk/uploads/1/3/1/0/131071252/9b1feb9c99d12.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/39431002600.pdf
    • https://cdn.shopify.com/s/files/1/0449/9347/8814/files/libro_de_acordeon_de_botones.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/california_dreamin_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/88924892845.pdf
    • https://cdn.shopify.com/s/files/1/0440/4586/1014/files/munimuxakofaxoforezotet.pdf
    • https://cdn.shopify.com/s/files/1/0438/9624/2331/files/83385622456.pdf
    • https://cdn.shopify.com/s/files/1/0440/5896/8229/files/ielts_speaking_band_9_sample_answer.pdf
    • https://cdn.shopify.com/s/files/1/0435/9074/6267/files/87503942828.pdf
    • https://cdn.shopify.com/s/files/1/0438/4335/4781/files/novela_los_de_abajo_de_mariano_azuela.pdf
    • https://cdn.shopify.com/s/files/1/0429/2159/0951/files/4782217131.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/biology_cape_syllabus_2020.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_off00005f13.bin
252753b9e821935160879f8efd4bde318ddda2fadab4ceb8457fe0060f3f6175		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F13 4888 bytes
font_01_sfnt_off00006f95.bin
53eefa700c0560bcc92387fd8fea4e4136d8d18a0d810d2a40782411b24eef57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F95 10840 bytes

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