Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c8068bf752e16fe…

MALICIOUS

PDF

37.5 KB Created: 2020-08-26 10:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99498fdcfbafdfa6cfc6917e3a95943f SHA-1: 0b242db94cce2c75df05d95793a0bd6014bc22de SHA-256: 2c8068bf752e16fe47d7ee8eb835976763961d1b41ec47e6c61382e350987028
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to downloading copyrighted music, which is used as a lure. The primary malicious URL identified is ttraff.ru, which is likely used to redirect the user to a malicious payload or phishing site. The presence of a large number of links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to increase visibility.

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.ru/pify?keyword=ub40+can%2527t+help+falling+in+love+with+you+mp3+download+320kbps
    • http://files.rimrockshop.com/uploads/1/3/1/6/131636834/jufanegakimupowup.pdf
    • http://melejo.pm-extreme.com/uploads/1/3/1/6/131636655/mipisi-venexud-sipudamosilij.pdf
    • http://files.chang4japan.org/uploads/1/3/2/7/132712011/bewikukinu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9634/9602/files/annotate_in_onenote_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/93135247217.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2523/files/gutulogab.pdf
    • https://cdn.shopify.com/s/files/1/0435/7573/8527/files/65931226889.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/towunerowamakaze.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/7999/files/carboprost_davis_drug.pdf
    • https://cdn.shopify.com/s/files/1/0437/2129/3974/files/bilstein_group_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0448/0391/5933/files/baciloscopia_que_es.pdf
    • https://cdn.shopify.com/s/files/1/0462/2739/0615/files/spider_solitaire_app.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_off0000468d.bin
1b31eca76a29dab6e24833994e51b2100cd4388db79e435b196c3c7f51411055		 pdf-font-stream PDF embedded font (sfnt) at offset 0x468D 6484 bytes
font_01_sfnt_off00005c92.bin
c37301570b18a2f12a91c097af7d6f417b76ad4b74162c676903c460f149fb11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C92 15224 bytes

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