Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf47b93fbedd02b3…

MALICIOUS

PDF

46.1 KB Created: 2020-07-30 16:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e6bd98a6f5be1502663a2e4412d1620 SHA-1: 8073c8cca26dc8465949398c7604a3280230fa96 SHA-256: bf47b93fbedd02b30df505b636bd16b714690bea4f951ee7cac039b2c6058e6b
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 a malicious redirector link, suggesting the document is designed to lead users to harmful websites. The presence of a mass external PDF link farm further supports this, as it's a common tactic for SEO poisoning or distributing malicious content. The document body itself is heavily obfuscated and contains metadata from wkhtmltopdf, indicating it was likely generated programmatically to host these links.

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=%25C4%258De%25C5%25A1tina+pro+cizince+u%25C4%258Debnice+a1+pdf
    • http://files.bestoftimeswatch.com/uploads/1/3/1/3/131379749/e4facd24be.pdf
    • http://files.hattology.com/uploads/1/3/1/8/131856290/2bb06.pdf
    • http://files.frankm-arts.studio/uploads/1/3/0/7/130738603/f67a97.pdf
    • http://files.globalleadership.net/uploads/1/3/2/3/132303229/gimesapupez_bodavumaka_mufawolugi_popido.pdf
    • http://files.hantverkgalleri.com/uploads/1/3/2/8/132814930/wezupubaped.pdf
    • http://files.globalleadership.net/uploads/1/3/2/3/132303229/gimesapup
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/fuxasosoroxi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/zufabamazo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6975/1967/files/6725564026.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/51355596288.pdf
    • https://cdn.shopify.com/s/files/1/0431/2150/8506/files/18269426575.pdf
    • https://cdn.shopify.com/s/files/1/0433/4020/2142/files/13507691638.pdf
    • https://cdn.shopify.com/s/files/1/0437/4672/1946/files/bokaba.pdf
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/xisamoxuwemisosijuzuriwoj.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/pafaberolatobuzexopox.pdf
    • https://cdn.shopify.com/s/files/1/0428/5608/7708/files/50210359495.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/lowegufotosijotaxezori.pdf
    • https://cdn.shopify.com/s/files/1/0429/2709/5967/files/zomowiga.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_off0000716d.bin
2ffec369412ce500b39fce4f4da636da66449e2d541a36ac74cf79a35380b264
pdf-font-stream PDF embedded font (sfnt) at offset 0x716D 5468 bytes
font_01_sfnt_off000083b5.bin
aea3b2488ddeb64629c1838644ec7fee59832d826e999af86fd2b5702b9f9b75
pdf-font-stream PDF embedded font (sfnt) at offset 0x83B5 12284 bytes