Malicious PDF — malware analysis report

Static analysis result for SHA-256 9122fd2e70df0d11…

MALICIOUS

PDF

43.3 KB Created: 2020-08-03 14:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72f3aa1d3f75aec3b28239af5a5055b3 SHA-1: 3c171ebfa25e0c3ff41fc9d251c475b947477922 SHA-256: 9122fd2e70df0d1191c909458808a5d9c3c041a095d3367cf661a0c346cc4139
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The primary malicious URL, https://ttraff.ru/pify?keyword=cambodia+visa+form+pdf, is identified as a redirector to potentially harmful content. The document body, though heavily obfuscated, contains references to 'Cambodia visa form pdf' and the tool 'wkhtmltopdf', suggesting a lure to trick users into downloading a malicious file. The presence of numerous links to Shopify-hosted PDFs, while many are benign, contributes to the link farm heuristic.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=cambodia+visa+form+pdf
    • http://files.embcmanning.org/uploads/1/3/1/4/131407944/wukinegipoxelix_rixilusekufud.pdf
    • http://files.wscornsnakes.com/uploads/1/3/1/4/131437669/8819648.pdf
    • http://files.elefantsnowboarding.com/uploads/1/3/1/4/131407178/poramugogo.pdf
    • http://files.patrickhowe.com/uploads/1/3/1/3/131398385/2182369.pdf
    • http://nimipoxe.elitecresties.com/uploads/1/3/0/9/130969772/75273a2b032810.pdf
    • http://files.wscornsnakes.com/uploads/1/3/1/4/1
    • https://cdn.shopify.com/s/files/1/0437/0527/0427/files/malexamidotaxebisu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6789/0069/files/79453654410.pdf
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/epa_609_certification.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3062/files/fixime.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5783/files/82577052133.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1688/files/43679356613.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/98036743535.pdf
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/namotokazedi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/sakopufozureraweg.pdf
    • https://cdn.shopify.com/s/files/1/0430/5082/7929/files/57891946011.pdf
    • https://cdn.shopify.com/s/files/1/0436/3426/2169/files/selokuwirazide.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_off00006a8e.bin
bce716cba5562c69fcf9429bcaa054bd860a2093d3e2a1cfe580e9ce4bbedee0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8E 5260 bytes
font_01_sfnt_off00007c52.bin
6c438cabcc0bd8121bb694de7fa062f83c47430676015b8325c9dec34dcd9820
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C52 10468 bytes