Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a5cee867e54648a…

MALICIOUS

PDF

43.5 KB Created: 2020-08-21 01:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aced920479bcfbffbc2182836ac67a79 SHA-1: 7eb1146fac7802faeae318744b03abb00a65f096 SHA-256: 1a5cee867e54648a13513828bb7b6678d995dd24e38f79d54c99a8874f461ca1
148 Risk Score

Malware Insights

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

The PDF contains a lure for a 'marksheet in excel file' and a call-to-action button. It embeds numerous links, including one to a known malicious redirector at `ttraff.com`. The document body also contains a callback lure, suggesting a potential tech-support scam or phishing attempt. The primary attack vector appears to be social engineering via a malicious link embedded within the PDF.

Heuristics 5

  • 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
  • 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.com/pify?keyword=marksheet+in+excel+file
    • http://files.lcooperillustration.com/uploads/1/3/1/1/131164129/11937183d429b1a.pdf
    • http://buguxa.coksmspirit.com/uploads/1/3/2/8/132814084/390838e3ab0.pdf
    • http://files.hips.org/uploads/1/3/0/8/130874676/dodilogowetidunejok.pdf
    • https://cdn.shopify.com/s/files/1/0433/3040/4502/files/gebepuwimizadomemudafuke.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5886/files/certificate_of_appreciation_for_employees_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/4798/5053/files/treatment_of_heart_failure.pdf
    • https://cdn.shopify.com/s/files/1/0440/4399/3238/files/66893150631.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/66911219512.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1969/files/sawowila.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/caterpillar_953_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9562/files/vulemunozabawiwidi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/mokuwiwuxelokuluresitar.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/twisted_treeline_rewards.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/xeretotadin.pdf
    • https://cdn.shopify.com/s/files/1/0431/9952/9120/files/chart_full_international_phonetic_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/22382471954.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/r_mysql_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/2807/7992/files/divina_commedia_inferno.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_off00006d56.bin
f65dd8332f0c713ab41ce1fa05d8caf0316107f7db2d4ae334a6f802ff3a7814		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D56 5104 bytes
font_01_sfnt_off00007eb6.bin
ead763123107227960bfed1a749e0d8357afaa8d89b8cbaef221ea04d2055a64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB6 10120 bytes

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