Malicious PDF — malware analysis report

Static analysis result for SHA-256 527d743c77dbe0ff…

MALICIOUS

PDF

34.3 KB Created: 2020-08-29 19:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c13a115ac85f8fcab8a252524ec95ab SHA-1: 23aa98dd6f91b750a9f0dad25f57644ec2123bb6 SHA-256: 527d743c77dbe0ff879f10bedd7b491674cabeb23c4d9b5f892ff68faff60c17
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=literature+and+its+writers+6th+editi'. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of embedded links to Shopify PDFs, which is indicative of a link farm, a common tactic for SEO poisoning or distributing malicious content. 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/wix?keyword=literature+and+its+writers+6th+editi
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/70890259767.pdf
    • https://cdn.shopify.com/s/files/1/0463/0400/2210/files/37893597282.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/nesuwesetolowe.pdf
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/22850549104.pdf
    • https://cdn.shopify.com/s/files/1/0431/7088/9892/files/19501210309.pdf
    • https://cdn.shopify.com/s/files/1/0432/1784/6432/files/xetobapawasusot.pdf
    • https://cdn.shopify.com/s/files/1/0467/9768/4885/files/56972653129.pdf
    • https://cdn.shopify.com/s/files/1/0431/8792/9249/files/parallel_lines_proof_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/43908907472.pdf
    • https://cdn.shopify.com/s/files/1/0434/9476/8792/files/19103000832.pdf
    • https://cdn.shopify.com/s/files/1/0431/9235/2931/files/99987654798.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/45831972.pdf
    • https://cdn.shopify.com/s/files/1/0435/6790/6975/files/evolutionary_psychology_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/banavelejo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/palmone_treo_650.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7414/files/14996592428.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_off000048c5.bin
3b1e3acdf7c54ba1b30f6d31239abd54e1c1037728af4b2c90119c892c6d6e4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48C5 5068 bytes
font_01_sfnt_off00005a0c.bin
c2b3990533cf27613f9e0f004619e166453988865fa4e77ab962d404aea1c614		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0C 10072 bytes

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