Malicious PDF — malware analysis report

Static analysis result for SHA-256 c043388fc41de4ed…

MALICIOUS

PDF

44.1 KB Created: 2020-08-12 11:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70d6dc96111b0f2755dfc2ab7ef28c39 SHA-1: bf92726d9e8ad4462124f9f319c5cef9f72aaf74 SHA-256: c043388fc41de4ed1933ff125b3ded0c3630cecbe54c2aac0636e06b6bbb3c34
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link farm and a critical heuristic firing for a malicious redirector. The embedded URL, 'https://ttraff.cc/wb?keyword=cabinetry%20installation%20manual', is presented as a cabinetry installation manual, likely to trick the user into clicking it. This URL redirects to further malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF_SEO_LINK_FARM heuristic indicates the document is designed to host numerous links, likely for SEO manipulation or to distribute further malicious content.

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/wb?keyword=cabinetry%20installation%20manual
    • http://files.elizasmuel.greatwebsitebuilder.com/uploads/1/3/2/6/132681985/xadedivifata_fiwok_werej_moretaruromisi.pdf
    • http://files.mikewritesfunny.com/uploads/1/3/1/3/131384293/e875c56c.pdf
    • http://files.katieluck.com/uploads/1/3/1/6/131606619/xapajafusiximel.pdf
    • http://popirifup.manuelamazzanti.com/uploads/1/3/1/3/131383483/vukozewag.pdf
    • http://files.outoftimedesigns.com/uploads/1/3/1/4/131438419/wejoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3399/files/63338161343.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/rogumupopozugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/93239029694.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/identify_noun_verb_adjective_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/0285/3538/files/pinimixude.pdf
    • https://cdn.shopify.com/s/files/1/0438/1143/8752/files/juxutepebidiladureluwi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1386/files/lurefagosowasupovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1011/3186/files/discord_welcome_message_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/linux_system_administrator.pdf
    • https://cdn.shopify.com/s/files/1/0435/7718/0328/files/32488531180.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/famivizuberugunowamusaro.pdf
    • https://cdn.shopify.com/s/files/1/0437/0120/7193/files/ccna_security_exam_topics.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96512150342.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_off00006e78.bin
f473167e6994d594491a4e0c7106e2ba501c06248c50c13feea7ce6e99ee397a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E78 4980 bytes
font_01_sfnt_off00007f54.bin
fbf658c90461a456b52b22ab721aef79e61285b6b1e75254c50a94861c0b1024
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F54 10148 bytes