Malicious PDF — malware analysis report

Static analysis result for SHA-256 285a0d0c99a206d1…

MALICIOUS

PDF

39.7 KB Created: 2020-09-03 00:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b4e2ef94db096891bc1dd5e05ce5f4f SHA-1: 981ff0cfdd01470680170126052587c66797be00 SHA-256: 285a0d0c99a206d168ad5fe4dbf5dd006a5e68ddd9166e68337e318022fa5c73
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to a 'weather report'. The presence of numerous other PDF links, many benign, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF. No scripts were extracted, limiting further analysis of the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wix?keyword=beulah+nd+weather+report
    • https://cdn.shopify.com/s/files/1/0431/0374/8260/files/overcome_public_speaking_anxiety_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/fusionner_des_fichiers_sur_mac.pdf
    • https://cdn.shopify.com/s/files/1/0440/1024/2198/files/kadavun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0457/0261/1100/files/sepipejawulajozilevema.pdf
    • https://cdn.shopify.com/s/files/1/0458/2673/6291/files/video_background_coming_soon_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/source_documents_used_in_business.pdf
    • https://cdn.shopify.com/s/files/1/0464/4981/9816/files/arabic_font_ttf_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/57439799295.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/kadowarefidozob.pdf
    • https://cdn.shopify.com/s/files/1/0459/9378/7559/files/20609745899.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/pusazaxipewujofitokun.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_off00005835.bin
d96c5c8c21745b316c4b451296df015fa6f9c91f117427d895f0f7b7eda929fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5835 5008 bytes
font_01_sfnt_off00006947.bin
8f9197c71db5e0b9c9636edc2c43721b78b6aba8d30a6c875413918f520b23c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6947 12680 bytes

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