Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9573db3a1dabbc8…

MALICIOUS

PDF

48.7 KB Created: 2020-08-23 21:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4405510ec6d18ecfe73d6837998cf643 SHA-1: 90a9a8139b437f5cf30ab0810380f74fa6383032 SHA-256: f9573db3a1dabbc87e3cbf96a55138812dcf72f71ed2a91b189bc1640796893a
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 resources. One critical heuristic firing indicates that the document links to known malicious redirector infrastructure via the URL https://ttraff.cc/pify?keyword=sepsis+3+guidelines+summary. This suggests the document is designed to lure users to malicious sites. 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.cc/pify?keyword=sepsis+3+guidelines+summary
    • http://files.intoactionsoberliving.com/uploads/1/3/0/7/130776273/9042750.pdf
    • http://files.lidgettandbeyond.org/uploads/1/3/1/3/131398134/rodenak_jugagisedopujon_banere.pdf
    • http://poderidi.thejerrywelch.com/uploads/1/3/1/3/131379730/murajukafe.pdf
    • http://tudogot.hilltopangusfarm.com/uploads/1/3/0/7/130738971/3441134.pdf
    • http://files.bethanylutheranrlf.com/uploads/1/3/1/3/131381819/sizumomonogup.pdf
    • https://cdn.shopify.com/s/files/1/0436/0660/5987/files/venevedomeme.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/novujisabaxojejebab.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/wubeteduwep.pdf
    • https://cdn.shopify.com/s/files/1/0439/7809/6798/files/apple_balanced_scorecard.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/pibopibinuzipapisukeza.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/69913231302.pdf
    • https://cdn.shopify.com/s/files/1/0430/4430/7098/files/42737932503.pdf
    • https://cdn.shopify.com/s/files/1/0433/7847/5162/files/open_hosts_file.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/romafuteja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.pdf
    • https://cdn.shopify.com/s/files/1/0438/5944/3862/files/album_songs_telugu_naa_songs.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_off0000722b.bin
a5795c6f6a91e62d49b4c50a768dfe1a54b6d5b593ff296c052272acd244d87d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x722B 5648 bytes
font_01_sfnt_off00008549.bin
231e098d94751d3987c7fbdb9d9e193f68d1d9c4f5026b9ed6af991c925f90d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8549 14936 bytes

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