Malicious PDF — malware analysis report

Static analysis result for SHA-256 23719878b47998cb…

MALICIOUS

PDF

46.3 KB Created: 2020-08-01 10:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2b0ac9665a3d734237c1ddfed8345e8 SHA-1: 6904f2b7794a39e4472950d3511ce2fa96e896a9 SHA-256: 23719878b47998cb3a5142ae1a92c686b5e20c2532758101bf5b7bce1177ed0e
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=yamaha+c3+scooter'. This suggests a phishing or scam attempt, likely using the 'Yamaha c3 scooter' as a lure. The ML classifier strongly supports the malicious nature of the document. No scripts were extracted, but the presence of a malicious redirector indicates a likely attempt to lead the user to a malicious site.

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/pify?keyword=yamaha+c3+scooter
    • http://files.danieldetogni.com/uploads/1/3/2/6/132695457/tukazenijasij.pdf
    • http://files.yerkesoutreach.org/uploads/1/3/1/4/131407818/2047483.pdf
    • http://files.luyiwangart.com/uploads/1/3/0/8/130814902/lemefoko-bolalunumesokot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mudamizoxudaxusuzo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8505/files/duzorox.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/1786467741.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/sekol.pdf
    • https://cdn.shopify.com/s/files/1/0435/8111/2483/files/xuvupunubutevotagive.pdf
    • https://cdn.shopify.com/s/files/1/0433/2008/2590/files/boxomixugok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bisadugizutojaririxenudep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43545787384.pdf
    • https://cdn.shopify.com/s/files/1/0432/2574/3521/files/52853497606.pdf
    • https://cdn.shopify.com/s/files/1/0437/7129/7943/files/wivabusukalutukutup.pdf
    • https://cdn.shopify.com/s/files/1/0435/8986/1535/files/70777216935.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lawup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53741046047.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_off0000784b.bin
536fed2618edf6dcd48135f447678352a2819441da649dcb6b801b43e6b733ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784B 5132 bytes
font_01_sfnt_off00008992.bin
a6be1460351eaef5e6077e1dd32cac7392357a3c0b030daa3ef84f9c9dd2f52a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8992 10292 bytes

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