Malicious PDF — malware analysis report

Static analysis result for SHA-256 454ea1c160355129…

MALICIOUS

PDF

35.5 KB Created: 2020-08-02 18:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 050975fc21c25515bd814e36dcdd121e SHA-1: d66aad40ebc634c4ca9377742ddd91d451920731 SHA-256: 454ea1c1603551291dfe7956cba81fd88f5b5de1bfad1d0f5da96242ea33ccdf
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious due to a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.com/pify?keyword=i+cherish+you. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's not a legitimate document. The ML classifier also strongly indicated maliciousness.

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=i+cherish+you
    • http://files.sluadg.com/uploads/1/3/1/8/131871704/3705502.pdf
    • http://files.flatspokecycles.com/uploads/1/3/1/4/131408529/6549756.pdf
    • http://files.b3risksolutions.com/uploads/1/3/1/4/131408741/torap.pdf
    • http://files.lakesidepaletteclub.org/uploads/1/3/0/7/130738662/gofenu-puzijajem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavoriduxosijalas.pdf
    • https://cdn.shopify.com/s/files/1/0434/9778/3458/files/54941915987.pdf
    • https://cdn.shopify.com/s/files/1/0440/8039/8486/files/56280477712.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/zakib.pdf
    • https://cdn.shopify.com/s/files/1/0428/5287/6455/files/kekegazovajuvorubo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7335/files/47929075388.pdf
    • https://cdn.shopify.com/s/files/1/0430/0819/6767/files/wogixadodofobu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/gobotaxofivisurufeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/253208758.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/40279088355.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/rofojoge.pdf
    • https://cdn.shopify.com/s/files/1/0430/3290/3833/files/dynamics_ax_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/reset_autonomous_desk.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_off00004f39.bin
553122781c6a3ab632a20b62ee18dc65b149e8a4da0b5b36a746f6748ca5914e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F39 4684 bytes
font_01_sfnt_off00005f2d.bin
494ea5ff9816eeee4e42b2c475bc6ada29ed41f5e32035afa0739548c946e42c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2D 10016 bytes

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