Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec13efaaab72bca9…

MALICIOUS

PDF

46.3 KB Created: 2020-08-23 23:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5990395cb299d58ad0dc6964eeb9e504 SHA-1: 811e0d7695d0cfac96c58d059d36f2ec9475ee04 SHA-256: ec13efaaab72bca96c354ef2d195f39766db9afd4053cabc94fa3002931a411b
140 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific URL pointing to a redirector, indicating a malicious redirection attempt. The document body, though heavily obfuscated, contains text related to 'Aluminized steel sheet welding' and a URL that appears to be part of a SEO spam campaign. The presence of a callback lure suggests a potential social engineering tactic to engage the user further. The primary malicious URL identified is https://ttraff.cc/pify?keyword=aluminized+steel+sheet+welding.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=aluminized+steel+sheet+welding
    • http://files.firststepcleburne.com/uploads/1/3/2/3/132303286/3077189.pdf
    • https://cdn.shopify.com/s/files/1/0433/3967/7855/files/cnis_cadastro_nacional_de_informaes_sociais_dataprev.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9283/files/wilupuganasonexaridopimam.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6981/files/21139967737.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/davodapawuvapagexewal.pdf
    • https://cdn.shopify.com/s/files/1/0437/5671/6186/files/57437434002.pdf
    • https://cdn.shopify.com/s/files/1/0440/7007/6566/files/74020623016.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/fovasijurivakigudovisuli.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/24231071469.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2661/files/66138647675.pdf
    • https://cdn.shopify.com/s/files/1/0437/7467/3057/files/interview_questions_for_marketing_manager.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_off00007799.bin
c5f1583dd4c20f0e800690727acfbb638f03786ea840b4955b715b41b13315cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7799 5064 bytes
font_01_sfnt_off000088c0.bin
37cd6b4be256577f9cd5965c5fa8b552875c3d2439b7522026bbb40aabb14f3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C0 10468 bytes

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