Malicious PDF — malware analysis report

Static analysis result for SHA-256 df09a669a7826995…

MALICIOUS

PDF

36.3 KB Created: 2020-08-25 16:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88dea48b31ca956178516e2391bebd08 SHA-1: 6f1904fc046fd037eea2ebe699985379626e1097 SHA-256: df09a669a7826995a3d20126751cd2c2217a5fcf721a6c1d08283a4b14876ca8
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, directing users to a URL that appears to be part of a link farm. The document body, though heavily obfuscated, contains the same URL and a search query for 'burlington english software for free', suggesting a lure to download potentially unwanted or malicious software. The PDF also contains numerous links to Shopify-hosted PDFs, likely part of an SEO manipulation scheme to increase visibility.

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/pify?keyword=burlington+english+software++for+free
    • http://rudirag.ryankarr.com/uploads/1/3/0/8/130813834/3a8a5d167.pdf
    • http://kotovosaz.shopsatuniversitysquare.com/uploads/1/3/2/7/132740564/f072e3c85a1b.pdf
    • http://nupixidi.building-understanding.org/uploads/1/3/1/4/131454065/kufute-pelezugiroboguj-murigipoji.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/download_r_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/7992/files/psc_marksheet_2018_comilla_board.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/dedorusadilonimufise.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.pdf
    • https://cdn.shopify.com/s/files/1/0432/1397/9812/files/connecticut_dmv_forms.pdf
    • https://cdn.shopify.com/s/files/1/0434/8136/6693/files/95160925981.pdf
    • https://cdn.shopify.com/s/files/1/0438/1710/7618/files/best_hd_nature_wallpaper_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/4149/6986/files/52481743108.pdf
    • https://cdn.shopify.com/s/files/1/0462/7949/1733/files/dusedubixixozoxafugazuwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6448/3240/files/jonamejakus.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/jevutibibezifuxadol.pdf
    • https://cdn.shopify.com/s/files/1/0430/9109/9799/files/assembly_programming_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8870/files/captivating_john_eldredge_free_download.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_off00004e53.bin
425b96bed04bb627f92ab261d15d81261ff91827ff0430d6ca6c9dfdeb4338fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E53 5172 bytes
font_01_sfnt_off00005ff7.bin
71306606e5c2ac9edd9c8b2ef5f22bf4a950e7b361bbbd51026cf4bc312c4a5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF7 10568 bytes