Malicious PDF — malware analysis report

Static analysis result for SHA-256 4207fde5a3b9ab0a…

MALICIOUS

PDF

38.8 KB Created: 2020-07-31 12:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ff376337880f3ac50932f4ac663dffd SHA-1: ca770eb97c61a8bf16b62379a2bf987b00b2b44a SHA-256: 4207fde5a3b9ab0a729e1dfad3ef636c35b5a1f426896b2e001786daf9b51493
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to song chords, suggesting a lure to disguise the malicious intent. The primary malicious URL identified is ttraff.cc, which is used to redirect users to other sites.

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.cc/pify?keyword=blessed+be+your+name+chords+pdf+key+a
    • http://files.beaverstatedentalequipment.com/uploads/1/3/0/9/130969183/252c6d.pdf
    • http://files.david-jones-society.org/uploads/1/3/0/8/130814642/dixagululekivex_tekixomixe.pdf
    • http://files.cabincreekfarmstudio.com/uploads/1/3/1/4/131454286/75eee3b.pdf
    • http://files.littlefeatherfoundation.com/uploads/1/3/1/4/131407918/xanijeselipepaveli.pdf
    • http://files.layeredintelligence.com/uploads/1/3/0/9/130969593/fafed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bijalikupuxamimidesedol.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/wavusurinibolazorimapev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37604868145.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruketisoren.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/27767340974.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/xobukubutesigetane.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nazowexoratusitufunu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/botozogivifi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/xekavupifezak.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/28362963205.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_off000058d2.bin
e1f19fd0ca0b5d01e319d3d8ecaf59fc0f29ba16bd67d35693e268141b92f31a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58D2 5504 bytes
font_01_sfnt_off00006b50.bin
503ce7d1ef675f9e18aa7e5ba36f876e5579fd20160a0a333d708058adfb815e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B50 9736 bytes

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