Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c4e6347464e971…

MALICIOUS

PDF

68.1 KB Created: 2020-08-12 03:34:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cb215f8298e722afce4305afd835da5 SHA-1: 52668a611a1b422bb8f4f6d3ac3776dce126ff7a SHA-256: 39c4e6347464e971766c9092745c30cf47c410881fc2679ef7b46f28b3ad0327
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector. The primary URL, 'https://ttraff.cc/pify?keyword=kalnirnay+calendar+december+2020+pdf', is identified as a malicious redirector. Many other links point to Shopify domains hosting PDF files, suggesting a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the extensive use of redirectors points to an attempt to lure users 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.cc/pify?keyword=kalnirnay+calendar+december+2020+pdf
    • http://nuron.watsonsflyballteam.co.uk/uploads/1/3/0/8/130873804/28d0a3571047ea3.pdf
    • http://mupepubu.perthdressageclub.com/uploads/1/3/1/3/131381204/e67de4.pdf
    • http://files.cambridgevalleyfarmersmarket.com/uploads/1/3/1/4/131437005/nokutabewola_purinusafoli.pdf
    • https://cdn.shopify.com/s/files/1/0437/7113/4106/files/73250939857.pdf
    • https://cdn.shopify.com/s/files/1/0429/9613/8137/files/85673613060.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/analytical_chemistry_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0444/3108/1639/files/python_list_remove_duplicates.pdf
    • https://cdn.shopify.com/s/files/1/0441/3983/9640/files/94693410827.pdf
    • https://cdn.shopify.com/s/files/1/0439/3782/4926/files/95845545582.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lorirazapevimixawas.pdf
    • https://cdn.shopify.com/s/files/1/0431/6204/2529/files/velenide.pdf
    • https://cdn.shopify.com/s/files/1/0429/4901/7756/files/nukumuguderaxu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9272/8226/files/62754091521.pdf
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/vuvoxemixuxozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7149/5574/files/tutorial_corel_draw_x5_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/81442953363.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/15881797433.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_off0000b720.bin
7302b3e0900725ec90428a40d2951032ec6989f73eb4f24ed81dc0eeab599ad8
pdf-font-stream PDF embedded font (sfnt) at offset 0xB720 5608 bytes
font_01_sfnt_off0000ca1c.bin
f271277bc92c8ec255f016eb89af31946ace6cee13b85d2ca72bafc089855a25
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1C 3024 bytes
font_02_sfnt_off0000d550.bin
d6790ae50bb361441d87fd07ef5d6159661e99e1f045dfadbb783f194fd9bf38
pdf-font-stream PDF embedded font (sfnt) at offset 0xD550 14612 bytes