Malicious PDF — malware analysis report

Static analysis result for SHA-256 e818ab377e1da22c…

MALICIOUS

PDF

40.6 KB Created: 2020-08-13 12:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fed21c566aba78a2cc6f1c1cbe2dc1f5 SHA-1: f57a19269cdf4f2029caeb8ad4e160a920a3badf SHA-256: e818ab377e1da22c4adea6e5be031ef4326e8ea1fa36ad7e9935fdecfdce8ef4
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 a URL that appears to be part of a link farm. The document body, though heavily obfuscated, contains text related to sewing machine manuals and the malicious URL. The primary malicious URL is `https://ttraff.ru/wb?keyword=kansai%20special%20sewing%20machine%20manuals`, which is likely used to lure victims into clicking through to a malicious site.

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/wb?keyword=kansai%20special%20sewing%20machine%20manuals
    • http://files.lifeisgoodwilliamsburg.com/uploads/1/3/1/0/131070378/cabefefab7216d.pdf
    • http://files.jpkindinger.com/uploads/1/3/1/3/131380745/1044996.pdf
    • http://files.naturalhealthperth.com/uploads/1/3/0/8/130815026/sibimimimodutaxom.pdf
    • http://files.apowersphotography.com/uploads/1/3/1/1/131164479/13b06.pdf
    • http://files.nfpplanning.com/uploads/1/3/1/4/131406799/2505347.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7087/files/31553403413.pdf
    • https://cdn.shopify.com/s/files/1/0436/8649/4361/files/13612626775.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/2371737489.pdf
    • https://cdn.shopify.com/s/files/1/0438/6720/9883/files/amebiasis_cutanea.pdf
    • https://cdn.shopify.com/s/files/1/0438/2418/5506/files/n1_mathematics_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0436/5775/6825/files/soduniwumozoze.pdf
    • https://cdn.shopify.com/s/files/1/0449/7873/3224/files/20521212990.pdf
    • https://cdn.shopify.com/s/files/1/0434/4784/5030/files/1st_2nd_conditional_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/megebulajikafifusumedipen.pdf
    • https://cdn.shopify.com/s/files/1/0440/9032/7205/files/tavaxesebedipov.pdf
    • https://cdn.shopify.com/s/files/1/0437/4603/3818/files/77869433798.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/doxokotosoziwebitubetetij.pdf
    • https://cdn.shopify.com/s/files/1/0435/7170/8065/files/82049476007.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_off00005d31.bin
e3a5e9570d5b8500ca40657b934b757d9775af2d04b6012d5eae47507333daee
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D31 5312 bytes
font_01_sfnt_off00006f34.bin
c59f0f9526eec5c8029faeac239bb718742bf3ba25d8b3d074d5f9b6b90e5ba4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F34 11976 bytes