Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7f8b910ba2ee3d…

MALICIOUS

PDF

40.8 KB Created: 2020-08-01 09:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa95e8ff1326b915dcdb2a799d8a35d0 SHA-1: 42022c29f6d5604d5ccaefcc5e6928fe304c391e SHA-256: be7f8b910ba2ee3d70128613ea310664f67fd3452ae4032f65cad733e29ad456
128 Risk Score

Malware Insights

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

The PDF contains a prominent call-to-action disguised as a download link for 'cube world free download 2017'. This link redirects to a known malicious redirector. The document also contains a large number of embedded links, many hosted on Shopify, which is characteristic of SEO link farm abuse to improve search engine ranking for malicious content. The presence of a visual download button further supports the lure.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=cube+world+free+download+2017
    • http://files.cribusinesssystems.com/uploads/1/3/1/4/131411474/1e9f956584de07.pdf
    • http://files.thegardenicearena.com/uploads/1/3/1/8/131856160/7faaa9f600d2d4.pdf
    • http://files.nexuseconomics.org/uploads/1/3/0/7/130775974/3931035.pdf
    • http://files.100wwclickingcounty.org/uploads/1/3/1/3/131378780/3a290e3e653ef.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/viwafagejuvekomasuta.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/sasizo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3097/7431/files/30649424157.pdf
    • https://cdn.shopify.com/s/files/1/0435/0548/3942/files/98394877129.pdf
    • https://cdn.shopify.com/s/files/1/0435/1819/7912/files/78028045173.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/80134972724.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/filakuzitarogirumupim.pdf
    • https://cdn.shopify.com/s/files/1/0438/3087/0173/files/lufomowezibefizep.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/17329405055.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/dedunanagunuxiwuroneg.pdf
    • https://cdn.shopify.com/s/files/1/0430/0845/8905/files/lojuluwukomedonikiwoze.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/12528950946.pdf
    • https://cdn.shopify.com/s/files/1/0434/5089/2440/files/zovovuwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4430/7098/files/bexamuvozumozurowolafajo.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_off00006218.bin
9d07fddae85001b6ed5827d34066832bcd6d51a515704188e7b2ebc8a77e0475
pdf-font-stream PDF embedded font (sfnt) at offset 0x6218 5268 bytes
font_01_sfnt_off00007426.bin
dac8b550aff098b7f75c5b04dd464fc95437bb9e50ade5b9831731ea5002ecd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7426 10092 bytes